My mercenary kicks ass with incendiary extended mag Thumper with acid bullets. This + "heal for damage" killstreak = unkillable. So your argument is invalid.
My sniper uses a shock rod... the sniper rifle is only a backup weapon. With Overkill you rape everyone. Add Extreme Stealth to the mix...
My Juggernaut(naught?) - Nitrogen Thumper with Nitrogen Rounds. 30% to reduce target's fire rate AND damage.
Tomyb, that's because bazookas explode only when fired from a certain range. By certain I mean... I think the closest of "rings" is 1/5 of screen, aprox 200 pixels.
Pramit, I had no problem at all. They didn't even hurt me. I upgraded mostly damage, pushback and spread - and not a single HP upgrade. It's best to focus on the rocket launcher one first, he is the thoughest and will screw you pretty badly.
BTW, developer - is it normal that shotgun soldiers drop flamethrowers and MG ones drop rocket launchers on death?