Fact is if when solo you are running through an entire blue bar you are doing it wrong or fighting something WAY too tough.
[You must be logged in to view images. Log in or Register.]
Engulfing Dark is cheap as is Invoke Fear, that last 20-30 intel won't help unless again, you are going from FM to empty. Anything taking more mana is prob hitting you way too hard to sustain.
The main factor against a big race is you are too dang big which is annoying. You also look kinda funky. Stat wise it's an advantage in almost every way, but as mentioned before, stats come with time and buffs.
Pick the one you like the look of.