in your Fightclass profile (for whatever class you play) you can add a Spell called: RunMacroText("/targetenemyplayer") and for the condition when to use that, you put: Target Is Player - FALSE. Then whenever it targets a nonplayer unit (pet totem vehicle) it uses /targetenemyplayer and should have a player in target if there is one in range. I use it with affliction warlock profile, because it kinda sucked to try putting up dots on a totem for minutes and totems are immune to dots lol :D
edit: forgot to mention you have to set "not spell, is lua script" TRUE in the spell settings (it is at the bottom).
just new to this bot I send you my first try of an ele shaman fight class. If you're interested please give it a try and let your comments. hints welcome ;)