Invocation + Evil sac dream, just testing some damages on album bosses.
The Invocation Skill is quite strong in Earth Tower/Solmiki, but is is highly under-rated as its easy to not notice the damage when you have multiple spells up. Also Evil sacrifice is basically useless at ET, and is only good for bossing and dungeon.
The estimated(?) damage numbers for invocation(per spirit) are :
lvl 1: 550%
lvl 2: 580%
lvl 3: 610%
lvl 4: 640%
lvl 5: 670%
lvl 6: 701%
lvl 7: 731%
lvl 8: 761%
lvl 9: 791%
lvl 10: 821%
Now you have to remember that each normal spirit hits 3 times, and each Greater Spirit(red) hits 6 times, so for example…
EACH Normal SPIRIT AT LVL 10 INVOCATION will hit for 2463%
EACH Greater SPIRIT AT LVL 10 INVOCATION will hit for 4926%
For context, in this vid, the summoned boss has 8,019,000 H (8m hp)