Exorcism is a skill that most people seem to be calling extremely bad but I just hit Priest 3 at r7 on my Bokor and decided to try it out.
TLDR: It hits at Skill DMG + matk for the first tick and half of that for 14 ticks. Each hit counts as proper hit and is not necessarily fake multi hit since each tick will take your full property damage bonuses. Enemy MDEF will reduce the damage greatly because it hits for half of (MATK+Skill DMG) for each tick after the first one. Cure level 3 will under all circumstances do more damage than exorcism level 1 on an all spr build with negligible matk. On an int build, you will easily do more using lvl 1 cure than level 5 exorcism. Balancing, ho!
My stats:
Matk - 311-311 ( I am all spr )
Mamp - 0
Skill Damage - 285 (level 1 exorcism)
Test 1 : Multi hit test vs Yellow Griba ( like 30-40 levels higher than me)
First tick - 1
2nd Tick - 1
Total HP removed : 15 = 15 ticks
Test 2 : Property attack 0,Enemy MDEF 0 (Yognome in Tenet Church b1 w/ hex to bring mdef to 0)
First Tick - 596
2nd-15th tick - 297
Test 3: Property Attack 25, Enemy MDEF 0
First Tick - 621
2nd-15th tick - 322
First tick Damage - (MATK + Skill Damage) -MDEF
2nd-15th tick Damage - (MATK + Skill Damage)/2 -Mdef + property damage
Test 4: Blue Spion (Holy Weakness, 254 mdef)
First Tick Damage: 684 (596-254 = 342 *2 = 684 check)
2nd- 15th tick Damage: 86 (297-254 = 43 * 2 = 86 check)
Total Damage: 1888
Cure lvl 1 Damage : 150 per tick
Total Cure Damage: 1500
Test 5: Blue Spion (Holy Weakness, 146 mdef because of hex)
First Tick Damage: 900 (596-146 = 450 * 2= 900 check)
2nd-15th Tick Damage: 302 (297-146 = 151 * 2 = 302 check)
Total Damage: 5128
Cure Lvl 1: 366 Damage per tick
Total Cure Damage: 3660