I have a +2 thin red line bloodletter but a +3 sounds even more enticing! Especially if it had +2 to phalanx lol.
I usually take 1 out of the grenade capacity skill and put it in auto bear. Paired with the targets take extra damage debuff rocket launcher, it allows you an “oh crap” button, and once you’re in a better spot you can hop out and have IB support for a little bit.
Also, I’d put one of phalanx/run while shooting skill into Force Feedback. Just for those off chances you do get a crit kill, all those recharge rate buffs get going. Great build! Couldn’t do it much better myself. That deathless relic stats are perfect too- shotgun/fire damage/cooldown encompasses every build you might ever have on her lol