Fry captured my typo in that 1st comment LOL, but I fixed it in discord (BotCommandsOn, not BotOnCommands).
At any rate, if you find you want to change your target on your MA then you need to do it semiautomatic, hotkey a /bot off and /killthis or whatever, so you have control over what mob you are killing. The other chars, if they are set up properly (i.e., XT1 slot) then they will do what they're supposed to. Bot is automated though, and isn't made so you can just interfere and change things on the fly like that, it'll want to keep killing its established target, and if you change it, will change back. That's why i said "semi" mode, temporarily turn it off and do what you want, once ready to go full auto again, just turn it back on for the MA.