Team play build as no healing of your own.
Build 30 stacks, blow up enemies with sticky bomb, immediately throw seeker after regardless of stacks to get best use of Demolition Expert talent as you likely killed a target with sticky bomb.
Although you can sub turret for seekers to build stacks the LMG and MP7 rate of fire make building stacks super easy and without two explosive skills the Demolition Expert talent is useless, even at 50% skill haste.
MP7 is just in case something gets close and you need to kill it fast without slow reload of LMG.
Rate of fire super important for building stacks.
If you are ok with 45% Haste and want a little more bang the 2 Electronics/Skill Haste mods can be switched for skill power mods. Personally I think the haste is worth it.