Rebalance dragon knight 20220608 (#7891)

* Vigor
- Changes bonus flat damage from +200% regardless of skill level to scaling with skill level up to +250% based on level 10.
- Increases bonus damage against demihuman and angel race monsters from 50% to 100%.
- Reduces AP consumption from 150 to 125.
- Increases HP consumption on each attack from 2 to 10 based on level 10.

* Dragonic Aura
- Reduces delay after skill from 1 second to 0.5 seconds.
- Increases damage from 9500%/14000%(demihuman and angel race)Atk to 36500%/38000%(demihuman and angel race)Atk based on level 10.

* Madness Crusher
- Removes 0.4 seconds variable casting time.
- Increases fixed casting time from 0.4 seconds to 0.5 seconds.
- Increases damage from 1350%Atk to 5150%Atk based on level 5 (using level 5 weapon and weapon weight is 150). (additional note: 4400% Atk on level 5 without weapon weight)
- Increases SP consumption from 50 to 68 based on level 5.
- Increases AP recovery rate from 2 to 3.
- Increases factor weight of POW in skill formula from 5 to 7.

* Storm Slash
- Reduces cooldown from 0.35 seconds to 0.3 seconds.
- Increases AP recovery rate from 1 to 2.
- Increases damage from 600%Atk to 950%Atk per hit based on level 5.
- Increases the chance to double skill damage while under Giant Growth buff from 15% to 30%.

* Servant Weapon - Demolition
- Reduces cooldown from 3 seconds to 0.5 seconds.
- Reduces AP recovery rate from 3 to 2.
- Increases damage from 750%Atk to 2500%Atk per hit based on level 5.

* Servant Weapon - Phantom
- Removes 0.8 seconds variable casting time.
- Reduces cooldown from 2 seconds to 0.5 seconds.
- Removes 0.8 seconds delay after skill.
- Increases damage from 600%Atk to 1700%Atk per hit based on level 5.

* Servant Weapon
- Increases number of hit from 1 hit to 2 hits.
- Increases damage from 450%Atk to 2500%Atk per hit based on level 5.

* Hack and Slasher
- Changes damage logic from 2 split hits to 2 cumulative hits.
- Increases damage from 3000%Atk to 7300%Atk per hit based on level 10.
- Increases cooldown from 0.3 seconds to 0.7 seconds.
- Reduces delay after skill from 0.5 seconds to 0.25 seconds.
- Increases SP consumption from 70 to 72 based on level 10.
- Increases factor weight of POW in skill formula from 5 to 7.

Thanks to @aleos89 !

src/map/skill.cpp

@@ -5199,7 +5199,6 @@ int skill_castend_damage_id (struct block_list* src, struct block_list *bl, uint
 	case RL_BANISHING_BUSTER:
 	case RL_SLUGSHOT:
 	case RL_AM_BLAST:
-	case DK_SERVANTWEAPON_ATK:
 	case BO_ACIDIFIED_ZONE_WATER_ATK:
 	case BO_ACIDIFIED_ZONE_GROUND_ATK:
 	case BO_ACIDIFIED_ZONE_WIND_ATK:
@@ -5611,6 +5610,7 @@ int skill_castend_damage_id (struct block_list* src, struct block_list *bl, uint
 	case SP_CURSEEXPLOSION:
 	case SP_SHA:
 	case SP_SWHOO:
+	case DK_SERVANTWEAPON_ATK:
 	case DK_SERVANT_W_PHANTOM:
 	case DK_SERVANT_W_DEMOL:
 	case DK_MADNESS_CRUSHER: