diff --git a/db/re/sc_config.conf b/db/re/sc_config.conf
index 1a9d301457a..295143801c3 100644
--- a/db/re/sc_config.conf
+++ b/db/re/sc_config.conf
@@ -773,7 +773,7 @@ SC_LKCONCENTRATION: {
 	}
 	CalcFlags: {
 		Hit: true
-		AtkPerc: true
+		Watk: true
 		DefPerc: true
 	}
 	Icon: "SI_LKCONCENTRATION"
diff --git a/db/re/skill_db.conf b/db/re/skill_db.conf
index 7fdd395fdef..bb5110c799e 100644
--- a/db/re/skill_db.conf
+++ b/db/re/skill_db.conf
@@ -10937,18 +10937,7 @@ skill_db: (
 	DamageType: {
 		NoDamage: true
 	}
-	SkillData1: {
-		Lv1: 25000
-		Lv2: 30000
-		Lv3: 35000
-		Lv4: 40000
-		Lv5: 45000
-		Lv6: 50000
-		Lv7: 55000
-		Lv8: 60000
-		Lv9: 65000
-		Lv10: 70000
-	}
+	SkillData1: 60_000 // Duration of SC_LKCONCENTRATION (in milliseconds)
 	FixedCastTime: 0
 	Requirements: {
 		SPCost: {
@@ -12246,43 +12235,10 @@ skill_db: (
 	AttackType: "Weapon"
 	Element: "Ele_Weapon"
 	NumberOfHits: 5
-	CastTime: {
-		Lv1: 150
-		Lv2: 250
-		Lv3: 350
-		Lv4: 450
-		Lv5: 500
-		Lv6: 500
-		Lv7: 500
-		Lv8: 500
-		Lv9: 500
-		Lv10: 500
-	}
-	AfterCastActDelay: {
-		Lv1: 1200
-		Lv2: 1400
-		Lv3: 1600
-		Lv4: 1800
-		Lv5: 2000
-		Lv6: 2200
-		Lv7: 2400
-		Lv8: 2600
-		Lv9: 2800
-		Lv10: 3000
-	}
+	CastTime: 250
+	AfterCastActDelay: 1_000
 	SkillData2: 1000
-	FixedCastTime: {
-		Lv1: 150
-		Lv2: 250
-		Lv3: 350
-		Lv4: 450
-		Lv5: 500
-		Lv6: 500
-		Lv7: 500
-		Lv8: 500
-		Lv9: 500
-		Lv10: 500
-	}
+	FixedCastTime: 300
 	Requirements: {
 		SPCost: {
 			Lv1: 18
diff --git a/src/map/battle.c b/src/map/battle.c
index 31844ee5779..772158492b1 100644
--- a/src/map/battle.c
+++ b/src/map/battle.c
@@ -2117,7 +2117,7 @@ static int battle_calc_skillratio(int attack_type, struct block_list *src, struc
 					break;
 #ifdef RENEWAL
 				case KN_BRANDISHSPEAR:
-					skillratio += 300 + 100 * skill_lv + status_get_str(src);
+					skillratio += 300 + 100 * skill_lv + status_get_str(src) * 5;
 					break;
 #else
 				case KN_BRANDISHSPEAR:
@@ -2368,7 +2368,8 @@ static int battle_calc_skillratio(int attack_type, struct block_list *src, struc
 	#else
 				case LK_SPIRALPIERCE:
 				case ML_SPIRALPIERCE:
-					skillratio += 50 * skill_lv;
+					skillratio += -100 + 150 + 50 * skill_lv;
+					RE_LVL_DMOD(100);
 	#endif
 					break;
 				case PA_SACRIFICE:
@@ -3040,8 +3041,10 @@ static int battle_calc_skillratio(int attack_type, struct block_list *src, struc
 					skillratio += 200;
 				if( sc->data[SC_TRUESIGHT] )
 					skillratio += 2*sc->data[SC_TRUESIGHT]->val1;
+#ifndef RENEWAL
 				if( sc->data[SC_LKCONCENTRATION] )
 					skillratio += sc->data[SC_LKCONCENTRATION]->val2;
+#endif
 				if (sd != NULL && sd->weapontype == W_KATAR && (i=pc->checkskill(sd,ASC_KATAR)) > 0)
 					skillratio += skillratio * (10 + 2 * i) / 100;
 #endif
@@ -5612,36 +5615,43 @@ static struct Damage battle_calc_weapon_attack(struct block_list *src, struct bl
 				if ( sd && s_ele != sd->bonus.arrow_ele )
 					s_ele = sd->bonus.arrow_ele;
 				break;
+
 			case NJ_TATAMIGAESHI:
-					ATK_RATE(200);
-				/* Fall through */
+				ATK_RATE(200);
+				ATK_RATE(battle->calc_skillratio(BF_WEAPON, src, target, skill_id, skill_lv, skillratio, wflag));
+				break;
+
 			case LK_SPIRALPIERCE:
-			case ML_SPIRALPIERCE: // [malufett]
-				if( skill_id != NJ_TATAMIGAESHI ){
-					short index = sd?sd->equip_index[EQI_HAND_R]:0;
-					GET_NORMAL_ATTACK( (sc && sc->data[SC_MAXIMIZEPOWER]?1:0)|(sc && sc->data[SC_WEAPONPERFECT]?8:0), 0);
-					wd.damage = wd.damage * 70 / 100;
-					//n_ele = true; // FIXME: This is has no effect if it's after GET_NORMAL_ATTACK (was this intended, or was it supposed to be put above?)
-
-					if (sd && index >= 0 &&
-						sd->inventory_data[index] &&
-						sd->inventory_data[index]->type == IT_WEAPON)
-						ATK_ADD(sd->inventory_data[index]->weight * 7 / 100);
+			case ML_SPIRALPIERCE: { // [malufett]
+				short index = sd?sd->equip_index[EQI_HAND_R]:0;
+				GET_NORMAL_ATTACK( (sc && sc->data[SC_MAXIMIZEPOWER]?1:0)|(sc && sc->data[SC_WEAPONPERFECT]?8:0), 0);
+				wd.damage = wd.damage * 70 / 100;
+				//n_ele = true; // FIXME: This is has no effect if it's after GET_NORMAL_ATTACK (was this intended, or was it supposed to be put above?)
 
-					switch (tstatus->size) {
-						case SZ_SMALL: //Small: 115%
-							ATK_RATE(115);
-							break;
-						case SZ_BIG: //Large: 85%
-							ATK_RATE(85);
-					}
-					wd.damage = battle->calc_masteryfix(src, target, skill_id, skill_lv, wd.damage, wd.div_, 0, flag.weapon);
-					wd.damage = battle->calc_cardfix2(src, target, wd.damage, s_ele, nk, wd.flag);
+				if (sd && index >= 0 &&
+					sd->inventory_data[index] &&
+					sd->inventory_data[index]->type == IT_WEAPON)
+					ATK_ADD(sd->inventory_data[index]->weight * 7 / 100);
+
+				switch (tstatus->size) {
+					case SZ_SMALL: // Small: 130%
+						ATK_RATE(130);
+						break;
+
+					case SZ_MEDIUM: // Medium: 115%
+						ATK_RATE(115);
+						break;
 				}
-				FALLTHROUGH
+				wd.damage = battle->calc_masteryfix(src, target, skill_id, skill_lv, wd.damage, wd.div_, 0, flag.weapon);
+				wd.damage = battle->calc_cardfix2(src, target, wd.damage, s_ele, nk, wd.flag);
+				ATK_RATE(battle->calc_skillratio(BF_WEAPON, src, target, skill_id, skill_lv, skillratio, wflag));
+			}
+				break;
+
 	#endif
 			default:
 				ATK_RATE(battle->calc_skillratio(BF_WEAPON, src, target, skill_id, skill_lv, skillratio, wflag));
+				break;
 		}
 
 			//Constant/misc additions from skills
@@ -5943,9 +5953,13 @@ static struct Damage battle_calc_weapon_attack(struct block_list *src, struct bl
 			){
 				int lv = sc->data[SC_AURABLADE]->val1;
 #ifdef RENEWAL
-				lv *= ((skill_id == LK_SPIRALPIERCE || skill_id == ML_SPIRALPIERCE)?wd.div_:1); // +100 per hit in lv 5
-#endif
+				if (skill_id == LK_SPIRALPIERCE || skill_id == ML_SPIRALPIERCE)
+					lv *= wd.div_; // +100 per hit in lv 5
+
+				ATK_ADD(sd->status.base_level * (lv + 3));
+#else
 				ATK_ADD(20*lv);
+#endif
 			}
 
 			if( !skill_id ) {
diff --git a/src/map/pc.c b/src/map/pc.c
index 65fe219b491..2db10af099d 100644
--- a/src/map/pc.c
+++ b/src/map/pc.c
@@ -6334,7 +6334,6 @@ static int pc_checkallowskill(struct map_session_data *sd)
 		SC_DANCING,
 		SC_GS_GATLINGFEVER,
 #ifdef RENEWAL
-		SC_LKCONCENTRATION,
 		SC_EDP,
 #endif
 		SC_FEARBREEZE,
diff --git a/src/map/status.c b/src/map/status.c
index 706b3e245bc..b6620e832d3 100644
--- a/src/map/status.c
+++ b/src/map/status.c
@@ -4419,8 +4419,10 @@ static int status_calc_atk_percent(struct block_list *bl, struct status_change *
 	if (sc->data[SC_PROVOKE] != NULL)
 		atk_percent += sc->data[SC_PROVOKE]->val3;
 
+#ifndef RENEWAL
 	if (sc->data[SC_LKCONCENTRATION] != NULL)
 		atk_percent += sc->data[SC_LKCONCENTRATION]->val2;
+#endif
 
 	if (sc->data[SC_HAMI_BLOODLUST] != NULL)
 		atk_percent += sc->data[SC_HAMI_BLOODLUST]->val2;
@@ -4687,6 +4689,12 @@ static int status_calc_watk(struct block_list *bl, struct status_change *sc, int
 			watk -= sc->data[SC_WATER_BARRIER]->val3;
 		if(sc->data[SC_GENTLETOUCH_CHANGE] && sc->data[SC_GENTLETOUCH_CHANGE]->val2)
 			watk += sc->data[SC_GENTLETOUCH_CHANGE]->val2;
+
+#ifdef RENEWAL
+		if (sc->data[SC_LKCONCENTRATION] != NULL)
+			watk += watk * sc->data[SC_LKCONCENTRATION]->val2 / 100;
+#endif
+
 		return cap_value(watk, battle_config.watk_min, battle_config.watk_max);
 	}
 #ifndef RENEWAL
@@ -8647,9 +8655,14 @@ static int status_change_start_sub(struct block_list *src, struct block_list *bl
 					total_tick += total_tick / 10;
 				break;
 			case SC_LKCONCENTRATION:
-				val2 = 5 * val1; // ATK% Increase
 				val3 = 10*val1; //Hit Increase
+#ifdef RENEWAL
+				val2 = 5 + 2 * val1; // ATK% increase
+				val4 = 5 + 2 * val1; // Def% reduction
+#else
+				val2 = 5 * val1; // ATK% Increase
 				val4 = 5 * val1; // Def% reduction
+#endif
 				sc_start(src, bl, SC_ENDURE, 100, 1, total_tick, skill_id); // Endure effect
 				break;
 			case SC_ANGELUS: