Pros/Cons of each Marauder build

stuff

Shockwave level 21: MP - 34, 565% Damage, 6 Enemies
Shockwave level 30: MP - 38, 700% Damage, 6 Enemies

Energy Drain level 11: Damage 315%, 16% of damage converted to HP
Energy Drain level 20: Damage 360%, 20% of damage converted to HP

Energy Blast level 21: Damage 366%, 4 Enemies
Energy Blast level 30: Damage 420%, 4 Enemies

Shockwave: -135%
Drain: -45%, and -4% converted
Energy Blast: -54%

moar stuff

Er. Use ratios.

Shockwave: 80.7% of max
Drain: 87.5% of max, heal 70% of max
Energy Blast: 87.1% of max

Looking at it this way, Drain and Energy Blast both take significant hits, but Shockwave takes the largest hit if you drop 9 points from it. Same thing, but this shows that Energy Blast doesn't lose a lot more than Drain.