diff --git a/db/re/skill_db.yml b/db/re/skill_db.yml
index c02dc3f05a..2be54927c1 100644
--- a/db/re/skill_db.yml
+++ b/db/re/skill_db.yml
@@ -38857,7 +38857,7 @@ Body:
         Time: 1500
       - Level: 5
         Time: 1000
-    Cooldown: 60000
+    Cooldown: 30000
     Requires:
       SpCost:
         - Level: 1
@@ -38888,26 +38888,27 @@ Body:
     FixedCastTime: 1000
     Requires:
       SpCost: 100
-      ApCost: 150
+      ApCost: 120
     Status: Abyss_Slayer
   - Id: 5319
     Name: ABC_ABYSS_STRIKE
-    Description: Abyss Strike
+    Description: Omega Abyss Strike
     MaxLevel: 10
     Type: Magic
     TargetType: Ground
     Range: 9
     Hit: Single
     HitCount: 1
+    Element: Fire
     CastCancel: true
     CastTime: 2000
     AfterCastActDelay: 500
     Duration1: 100
-    Cooldown: 3000
+    Cooldown: 700
     FixedCastTime: 1000
     Requires:
       SpCost: 125
-      ApCost: 15
+      ApCost: 10
     Unit:
       Id: Dummyskill
       Range: 4
@@ -39022,7 +39023,7 @@ Body:
     Hit: Multi_Hit
     HitCount: 2
     Element: Weapon
-    GiveAp: 1
+    GiveAp: 3
     CastCancel: true
     AfterCastActDelay: 500
     Cooldown: 350
@@ -41240,7 +41241,7 @@ Body:
       Splash: true
     Range: 1
     Hit: Multi_Hit
-    HitCount: 2
+    HitCount: 5
     SplashArea: 4
     Requires:
       SpCost: 1
diff --git a/src/map/battle.cpp b/src/map/battle.cpp
index e348392c83..d49827c622 100644
--- a/src/map/battle.cpp
+++ b/src/map/battle.cpp
@@ -4231,7 +4231,7 @@ static void battle_calc_multi_attack(struct Damage* wd, struct block_list *src,s
 			break;
 		}
 		case ABC_FRENZY_SHOT:
-			if( rnd()%100 < 5 * skill_lv ){
+			if( rnd_chance( 5 * skill_lv, 100 ) ){
 				wd->div_ = 3;
 			}
 			break;
@@ -5734,7 +5734,7 @@ static int battle_calc_attack_skill_ratio(struct Damage* wd, struct block_list *
 			RE_LVL_DMOD(100);
 			break;
 		case ABC_ABYSS_DAGGER:
-			skillratio += -100 + 100 + 900 * skill_lv;
+			skillratio += -100 + 350 + 1400 * skill_lv;
 			skillratio += 5 * sstatus->pow;
 			RE_LVL_DMOD(100);
 			break;
@@ -5743,20 +5743,22 @@ static int battle_calc_attack_skill_ratio(struct Damage* wd, struct block_list *
 			RE_LVL_DMOD(100);
 			break;
 		case ABC_CHAIN_REACTION_SHOT:
-			skillratio += -100 + 850 * skill_lv + 15 * sstatus->con;
+			skillratio += -100 + 850 * skill_lv;
+			skillratio += 15 * sstatus->con;
 			RE_LVL_DMOD(100);
 			break;
 		case ABC_CHAIN_REACTION_SHOT_ATK:
-			skillratio += -100 + 600 + 2350 * skill_lv + 15 * sstatus->con;
+			skillratio += -100 + 800 + 2550 * skill_lv;
+			skillratio += 15 * sstatus->con;
 			RE_LVL_DMOD(100);
 			break;
 		case ABC_DEFT_STAB:
-			skillratio += -100 + 250 + 350 * skill_lv;
-			skillratio += 5 * sstatus->pow;
+			skillratio += -100 + 700 + 550 * skill_lv;
+			skillratio += 7 * sstatus->pow;
 			RE_LVL_DMOD(100);
 			break;
 		case ABC_FRENZY_SHOT:
-			skillratio += -100 + 150 + 600 * skill_lv;
+			skillratio += -100 + 250 + 800 * skill_lv;
 			skillratio += 15 * sstatus->con;
 			RE_LVL_DMOD(100);
 			break;
@@ -8307,13 +8309,16 @@ struct Damage battle_calc_magic_attack(struct block_list *src,struct block_list
 						RE_LVL_DMOD(100);
 						break;
 					case ABC_ABYSS_STRIKE:
-						skillratio += -100 + 2200 * skill_lv + 10 * sstatus->spl;
+						skillratio += -100 + 2650 * skill_lv;
+						skillratio += 10 * sstatus->spl;
 						if (tstatus->race == RC_DEMON || tstatus->race == RC_ANGEL)
-							skillratio += 150 * skill_lv;
+							skillratio += 200 * skill_lv;
 						RE_LVL_DMOD(100);
 						break;
 					case ABC_ABYSS_SQUARE:
-						skillratio += -100 + ( 570 + 20 * pc_checkskill( sd, ABC_MAGIC_SWORD_M ) ) * skill_lv + 5 * sstatus->spl;
+						skillratio += -100 + 750 * skill_lv;
+						skillratio += 40 * pc_checkskill( sd, ABC_MAGIC_SWORD_M ) * skill_lv;
+						skillratio += 5 * sstatus->spl;
 						RE_LVL_DMOD(100);
 						break;
 					case TR_METALIC_FURY:
@@ -8388,7 +8393,8 @@ struct Damage battle_calc_magic_attack(struct block_list *src,struct block_list
 						RE_LVL_DMOD(100);
 						break;
 					case ABC_FROM_THE_ABYSS_ATK:
-						skillratio += -100 + 100 + 500 * skill_lv + 5 * sstatus->spl;
+						skillratio += -100 + 150 + 650 * skill_lv;
+						skillratio += 5 * sstatus->spl;
 						RE_LVL_DMOD(100);
 						break;
 					case EM_ELEMENTAL_BUSTER_FIRE:
@@ -9912,7 +9918,7 @@ enum damage_lv battle_weapon_attack(struct block_list* src, struct block_list* t
 				sd->state.autocast = 0;
 			}
 
-			if( sc->getSCE(SC_ABYSSFORCEWEAPON) && sd->abyssball > 0 && rnd() % 100 < 15 ){
+			if( sc->getSCE(SC_ABYSSFORCEWEAPON) && sd->abyssball > 0 && rnd_chance( 25, 100 ) ){
 				uint16 skill_id = ABC_FROM_THE_ABYSS_ATK;
 				uint16 skill_lv = sc->getSCE(SC_ABYSSFORCEWEAPON)->val1;