Good Casual Duo Strategy/Builds?

My friend and I just started Div2 up again and play for about 90 min or so every night but are struggling a bit to get back to the level we were at a 18 months ago. Challenging is doable but Heroic gives us trouble.

We’re both around 350 SHD lvl and just now figuring out this proficiency/expertise garbage. It’s not worth investing the time/money on that stuff when every night we might get an item/weap that has better rolls than the ones we’re using. Also the game is currently fun but I don’t want to start using our 90-min window to do some chore-runs or pugs just to hopefully get an upgrade or two.

Summit is kind of entertaining at the moment though I buggered something up and reset our progress from 55 down to 1 (now back to 30). Descent can suck it. Countdown is a maybe but is it even worth it on Normal/Hard? Challenging might be but we’re not sacrificing our inappropriate Discord banter for in-game VOIP just to hear some alpha pre-pubescents rage-squeak out orders.

I run a HW seeker build and do about 60-65% of the DPS but I’m squishy. I’ve got a determined/hot-shot build that’s alllllmost there but not quite ready for prime-time. He’s tinkering with Exuro Turret build but doesn’t have the pizazz that Firecrest did so is also piecing together a Hunter’s Fury set. I like hanging back, he likes charging in. Peak fun was Div 1 with my Striker/healer hybrid and his Firecrest chaos. Heroic and Legendary were doable and nothing felt like a chore.

So? You’ve got 90 minutes to have fun, cause chaos, say dark shit privately, but still make some progress towards Legendary success.. What are some good modes to play and builds to focus on?

Thanks for any tips!