Rebalance of MO_EXTREMITYFIST (Asura Strike)

- Change required spheres when used after Raging Thrust or Root
  - Old: 4 spheres were required
  - New: 1 sphere is required
- Doubles damage when there are 6 or more spirit sphere on cast
- SP recovery penalty duration reduced: 10s -> 3s

From massive skills rebalance (1st/2nd/transclass) (2018.10.31)

db/re/skill_db.conf

@@ -8295,8 +8295,8 @@ skill_db: (
 		Lv9: 1
 		Lv10: 1
 	}
-	SkillData1: 10000
-	SkillData2: 300000
+	SkillData1: 3_000 // Duration of the SP Recovery block (in milliseconds) (SC_EXTREMITYFIST2)
+	SkillData2: 300_000
 	FixedCastTime: {
 		Lv1: 2000
 		Lv2: 1750

src/map/battle.c

@@ -5522,10 +5522,13 @@ static struct Damage battle_calc_weapon_attack(struct block_list *src, struct bl
 			case MO_EXTREMITYFIST: // [malufett]
 			{
 				short totaldef = status->get_total_def(target);
-				GET_NORMAL_ATTACK((sc && sc->data[SC_MAXIMIZEPOWER] ? 1 : 0) | 8, skill_id);
-				if ( wd.damage ) {
+				GET_NORMAL_ATTACK((sc != NULL && sc->data[SC_MAXIMIZEPOWER] != NULL ? 1 : 0) | 8, skill_id);
+				if (wd.damage != 0) {
 					ATK_ADD(250 * (skill_lv + 1) + (10 * (status_get_sp(src) + 1) * wd.damage / 100) + (8 * wd.damage));
 					ATK_ADD(-totaldef);
+
+					if (sd != NULL && sd->spiritball_old >= 6)
+						ATK_ADDRATE(100); // +100% damage = doubles the damage
 				}
 			}
 				break;

src/map/skill.c

@@ -15665,6 +15665,9 @@ static int skill_check_condition_castbegin(struct map_session_data *sd, uint16 s
 			if(sc && sc->data[SC_EXTREMITYFIST])
 				return 0;
 #endif // 0
+#ifdef RENEWAL
+			sd->spiritball_old = sd->spiritball;
+#endif
 			if (sc && (sc->data[SC_BLADESTOP] || sc->data[SC_CURSEDCIRCLE_ATKER]))
 				break;
 			if (sc && sc->data[SC_COMBOATTACK]) {
@@ -17181,16 +17184,21 @@ static struct skill_condition skill_get_requirement(struct map_session_data *sd,
 				req.spiritball = 0;
 			break;
 		case MO_EXTREMITYFIST:
-			if( sc )
-			{
-				if( sc->data[SC_BLADESTOP] )
+			if (sc != NULL) {
+				if (sc->data[SC_BLADESTOP] != NULL) {
+#ifndef RENEWAL
 					req.spiritball--;
-				else if( sc->data[SC_COMBOATTACK] )
-				{
-					switch( sc->data[SC_COMBOATTACK]->val1 )
-					{
+#else
+					req.spiritball = 1;
+#endif
+				} else if (sc->data[SC_COMBOATTACK] != NULL) {
+					switch (sc->data[SC_COMBOATTACK]->val1) {
 						case MO_COMBOFINISH:
+#ifndef RENEWAL
 							req.spiritball = 4;
+#else
+							req.spiritball = 1;
+#endif
 							break;
 						case CH_TIGERFIST:
 							req.spiritball = 3;
@@ -17199,8 +17207,9 @@ static struct skill_condition skill_get_requirement(struct map_session_data *sd,
 							req.spiritball = sd->spiritball?sd->spiritball:1;
 							break;
 					}
-				}else if( sc->data[SC_RAISINGDRAGON] && sd->spiritball > 5)
+				} else if (sc->data[SC_RAISINGDRAGON] != NULL && sd->spiritball > 5) {
 					req.spiritball = sd->spiritball; // must consume all regardless of the amount required
+				}
 			}
 			break;
 		case SR_RAMPAGEBLASTER: