So, I played a few matches, earned 60000 credits and went to buy a Spectre Pack, not expecting much. Turns out, I finally got a Krogan Soldier. About time. Now I'm not sure how to allocate this guy's skills, since he starts out at level 20. Should I pick either Carnage or Inferno Grenade or rather split my points between both? I think I'll give him the Claymore shotgun with an increased clip and blade attachment.
EDIT: I ended up putting 4 points in Carnage and Inferno Grenade and maxing everything else. However, for some reason I can't see the enemy when I play.