I've been trying out some lesser used stuff a little disappointed in progression items. Tesla gun seems to have to be pretty close to be effective. I bought the spear and couldn't get it to lock on to anything. The Tesla turret just got shat upon by bots and didn't seem to kill much. I hear a lot of people say they like the rail gun but you have to reload on every shot. I know each thing has weaknesses...
Basically, I am bringing a Devastator, Eagle Cluster, Mortar, Autocannon, and one free slot to tweak strategy, usually either another turret or strike. Mortar is king right now and will probably be nerfed. You get a lot of FF with it but it is clutch.
I agree that they're going to have to get armor fixed, items rebalanced, and more content out fast or this game is going to flame out in a month. It's a lot of fun but people are flying through the progression and there isn't a lot of content to look forward to.