Mealybugs :( need repotting advice for multiple species of orchid :(

[yeoshua88]

So I have been aggressively fighting a mealy bug infestation for about 2 months now. It came in on a new paph that I bought and before I noticed the infestation it had already spread to a dendrobium nobile and 2 of my phals including a schleriana. I have gotten the infestation "controlled" in the sense that I have not seen any mealybugs on any orchids other then phal schleriana in about a month now (even the origonal paph). The poor schleriana has gotten so stressed that it started putting up a keiki 2 weeks ago which I have never had happen to one of my orchids before and that keiki is the only spot that I have seen any mealy bugs and it has only been nymphs. I have not seen any on the long leaves in about a month. I have been switching between isopropyl alchohol, a pyrthrine based insecticide, and neem oil doing ~once a week for 3 weeks before starting the next treatment. I have also been watering all orchids seperetly to prevent eggs/nymphs from being transfered between orchids during waterings. While I have it controlled now if I keep fighting like this the mealybugs probably will have a massive outbreak infestation again due to resistance so now is probably the best time to repot since I have a few resistant bugs isolated to one orchid currently. I would rather repot now then wait for the resistant bugs to grow out of control. I should repot all orchids that are in the potential infection zone which sadly is 7 orchids (I have 3 phals, an oncidum, a zygo, and a paph that all could theoretically be infected due to proximity and cannot be moved due to my apartment set up. I have been treating all orchids like they are infected even if no bugs were seen on them and have not seen any on the oncidum, zygo, and one of the paphs even with me looking extremely closely almost everyday.

The phals are all putting up spikes right now but are extremely well established so probably will be fine for repotting because I think a nuclear accident could not kill them. I however, now find myself in the situation of having to repot a dendrobium, paph, zygo, and oncideum which I have never done before and am extremely nervous to have to do this all at once.

I have heard that zygopetalum in particular tend to just die if repotted at the wrong time. The zygo is currently putting up new shoots and roots so from my understanding this is the absolute worst time to repot and it will die if I do it now. Any advice on how to repot all these orchids species for the first time would be greatly appriciated.

Sorry for the long post.