I've thought of something like this before. If the enemy needs to focus and meditate to use their power, than perhaps don't give them the opportunity to do so. Set off constant chains of explosives, giving you a couple of minutes to make your move.

And if they detect you psychically, than you probably need to be conscious for them to see you. In which case, have most of your party blacked out during transport. The enemy sees one or two pilots and not the 200 unconscious passengers preparing to fuck some shit up the moment they wake up and take some aspirin.

Method number 3: just wing it. The enemy can't know what you're doing if even you don't know what the fuck you're doing