Basically anything in the spider/Neuro complex, as listed on owal website. When you combine any of them bad things happen.

As far as what to pair with your snakes, it's up to what you like, but if they were my snakes, I'd probably get a male with enchi and or ghi because enchi looks great with banana and ghi looks great with Mojave. Fire enchi could be a good choice as well.

As far as getting another female, a fire pinstripe or fire pastel calico could really mesh well with your male bumblebee.