[Slydria]

Here you go, did some tests against Spatial Corrupters.

Modifiers from Stats, Skills, Equipment, Talents:

83 WIL
29 Spell Power Tome
+10 Damage with Evocation
+5 Damage with Rank 5 Geomancy
+10% Darkness Damage with Dark Invasion

Close Range Test (1-3 tiles away)

Level 45 Spatial Corrupter (60 RES)

Rank 4 Magaisendo (WIL+20) (*2.5 with Charge Mind)
307 Earth Damage

Rank 4 Magaisendo (WIL+20)
87 Earth Damage

Rank 5 Wretched Oil (80% WIL+10)
30 Earth Damage
33 Darkness Damage
(Inflicted LV 30 Poison)

Far Range Test (8+ tiles away)

Level 45 Spatial Corrupter (62 RES)

Rank 4 Magaisendo (WIL+20) (*2.5 with Charge Mind) (Half damage for Maximum Distance)
122 Earth Damage

Rank 4 Magaisendo (WIL+20) (Half damage for Maximum Distance)
12 Earth Damage

Rank 5 Wretched Oil (80% WIL+10)
29 Earth Damage
31 Darkness Damage