Mind sweeper pretty much has to have a point in redistribution, and the fewer points in Torgue Cross Promotion the better. Hopefully you mod has gun damage, assault rifle damage, or grenade damage.
Relic, get an Otto idol. Same stats as the mod, max health boost is nice, mag size is almost necessary on the relic.
Shield, big boom blaster is great for this build. Anointed obviously preferred.
Make sure to have a q-system to hit crits, it works wonders for mind sweeper. The carrier is awesome too if you can find a tracker dart version (you will be able to heal and full your grenades super quickly). At least a puck tracker, that’s what I was using and it’s ok. The damage is low-ish but you can constantly crit and it sends out a second bullet (sometimes 3rd with cloud of lead) and with Short Fuse you proc MoD.
It seems that Short Fuse procs grenade regen significantly better than just using regular splash guns. The Ogre is great too. Just look for guns that crit easily. Rebel Yell is awesome, but the mag runs out so fast you don’t have time to proc MoD more than once or twice.
Grenade us a homing divider/mirv/bouncy purple. Nagata works really well if you don’t want to use a homing nade.
Iron bear, explosive mini gun or no augment rocket pods. I prefer mini gun because the reload is way too long on the rockets.
Reason for going into thin red line is because the last 20% of your health bar heals so slowly unless you’re spamming grenades and wasting them. Vampyr is based on missing health so you won’t even notice the missing health anyway, and get a larger shield. However, you can take the 6 points out of SoR tree and put them in BM or whatever you want.
Damage output is lower and less aggressive than blast master, but has better healing if you’re hitting crits. If you’re just spraying or not actively going for crits then don’t even bother with mind sweeper.
Find a good corrosive/cryo gun to take out armored health bars because most of those enemies are tough to crit and you will struggle to use mind sweeper effectively on them.
Sorry for the long post, hopefully it at least gives you some ideas. Just make sure you do short fuse and not forge… Short fuse is a must in my opinion after dummy testing and bossing a lot.