Is there anyway to get better at breachs w/ witch minion build?

I have almost all the minion damage passive nodes and I use reavers/arsonists with 1 or 2 skeleton clerics and i use srs+flame vulnerability which spreads the curse after mod death with volatile dead for extra fire/spell dmg mods with spell echo and it normally clears really good. I'd used detonate dead but I don't have anymore skill slots so I went volatile dead which is pretty ok for damage. I keep only 1 spell for my witch for damage in case my minions get cleared but that almost never happens. Except when they kill themselves...

I'm lvl 79 and still on tier 5 for atlas quest and I can't keep a breach going for longer than maybe 2 or 3 rare mini bosses, which is probably under a minute? and I can't make much progress running around or I'll get swarmed and killed. My minions do great damage on anything else, but breach sucks. I'm wondering if it's just because minions ai just doesn't prioritize mobs very well and instead of focusing all on one thing they just scatter and that slows everything down.

I actually like the concept of breach more than delirium but it's feeling like I have to stick with delirium even though I don't care for it. If I'm already having this problem on a lvl 69 map then I can't even fathom how I'm supposed to do breaches on irradiated and corrupted nodes tier 8+.

I just finished my 5th attempt on a normal node with breach and I felt like I killed things very quickly but it was still over quick enough that I barely made much progress on the map. I'm not feeling like I'll get even more powerful to clear better either cause I have pretty much everything I wanted for my build. Which isn't weak mind you. I just did my 4th ascendancy in sekhemas yesterday and beat it. At lvl 77/78. I don't think a weak build could get through that but maybe I'm wrong and just got lucky.

I don't really expect theres much i can do to improve my clear speed but I've heard of minion witch builds clearing t15 breaches and I literally just don't understand how that's possible. I can wreck bosses and mobs fine but super high clear speed seems impossible.