You can always use uppers: bryan, gertrud, wardog, dean/jane ramba 2*, ruby, zatman, samantha, dorian
You can try them with bangers: graff, blaaster, b ball bodenpower, bryan, gertrud, wardog, dean/ jane ramba 2*, or graff, blaaster, b ball, vermyn n, bryan, emeth, wardog, dean/ j r 2*
Nightmare can fit nice as well: kolos, glorg, shetane/hel, erzsebet/dieter, bryan, wardog, dean/j r lvl 2, bruce
You can also try ulu watu, or cats, but that has been mentioned before.
I wouldn't recomend to play it with gheist or roots though, because you will have a hard time to hit the opponent. For the same reasons you should also avoid freaks, and fang pi
Seriously, I would love to play pure La Junta, but since you are planning to consider playing them with another clan, i suppose pussycats is your best bet IMO. With this build, you have alot of breathing room for tactics with a heavy wall Clara SOB and a dangerous Yayoi SOA. GG's!
Congrats JP, it is a good deck! It is kind of expensive to maintain, but it looks dangerous
One tiny note to make it cheaper (I know that it is kind of obvious, and it maybe not better, but cheaper): Bruce for wardog, and you can use ella for one of the 1* cats. (on financial basis gwen, on gameplay based svelthlana).