Pros/Cons of each Marauder build

As I posted on SW:

[color=green]I'm still deciding whether to max shockwave, blast, or drain.

I definitely want max in 2, and 9 less in 1.

I was originally going to get 21 shock, but I'm not sure. The 9 points seems to be a lot of difference, whereas for blast, it's not as much, and for drain it's even less. Considering I won't be using drain as a main attacking skill, but as a secondary skill, I'm thinking of only getting 11 in it.

I derno. SP's skill tables are down so I can't check to see exactly.

Okay. I'm going to assume Strategywiki isn't lying to me.

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%

Basically, Shockwave takes the biggest damage hit.
Drain loses the least, however it does lose that converted change of 4%, which is somewhat easy to ignore.
Energy Blast loses an average amount.

In other words, I'm considering maxing Shockwave and leaving drain at 11 for this. 45% damage isn't too much, considering I won't be using drain as a main attack skill (probably in between blasts, with SSK), and it still heals a significant amount.

Hmph.

I'm still gonna go energy first, but just skip the 20 drain and get to 11 instead.