Quote from gentrone;270766:
How so?
Mana Reduction = -10% MP
151 Crystal Lightning Wand = -35% Damage, -40% MP
Element Mastery = +15% Damage, -20% MP
Bolt Mastery = +15% Damage, -20% MP
Bolt Composer = +15% Damage
Ice + Lightning x5 = 45mp ( -10% -40% -20% -20% ) =
15.552mp
Base Damage = 230 ( -35% +15% +15% +15% ) = 227.37 (+400 Int) =
272.84
Targets hit =
5~15 [1414.2 - 4242.6]
Thunder = 49mp ( -10% -40% -20%) =
21.168mp
Base Damage = 500 (-20%) = 400 ( -35% +15%) = 299 (+400 Int) =
358.8
Targets hit =
1-4 [358.8 - 1435.2]
Can't tell if bolts will OHKO Hobgoblins with the 151 wand, but I'm sure they have less than 300 HP so it's likely that they will. Warriors would take 2 shots without crit though.
Assuming they are one-shots, even if you hit one hobgoblin per Ice/Lightning fuse, it'd still be about 75% the mana usage as Thunder, but with 7.5 second loading time opposed to 3.5 seconds.
That's not too big of a deal since you get like 5-20 seconds in between groups to charge, and the fusion setup lets you hit 15 per charge instead of 4.