Should I just give up on farming my own "perfect" Mercenary?

Merc league was one of my favourites, but never got around to playing support, so it was an obvious choice as my second build this league. One restriction I set for myself was that I can only use mercs I find. Had them on pretty much all my atlas trees (okay, 90% if the league Ive just been farming ritual) and last week I finally found a decent manyshot that made me sell my PRAW and level a Lumi.

The build is great, amazing clear especially if HH gets ramping, but the single target is heavily lacking. From what I've read I need a Kineticist for that, but the few I've seen were all trash. Not a single return support so far, not even halfdecent skill+support setups. The best warrats I got are still gathering dust at 1d a pop in Faustus.

Not sure what to do at this point. I'm kind done with the league, but wanna try the OP version of this already strong build. Should I just save up a few dozen divs for a decent Kineticist? Drop everything and go all-in on merc hunting? Look for a melee/trapper merc to destroy some single target stuff? What would be the "minimum viable kineticist" to surpass my current manyshot (pic in comments)?

Thanks in advance!