i have titles given through my quest plugin and various other things when playing, how do i get these wiped when fb do their monthly forced wipe?

You would use the function (if available) to reset ranks or rewards from those other plugins, Betterchat only displays information from those other plugins it does not change them

i dont have any other plugin to control this, only better chat :(, i created the group in rcon using the add group command but that is it.

Then you willl have to manually remove them from the groups at each wipe (not something i would look forward to) afaik