Regen ON Command per fightclass

Hi, I need a possibility to say the char. "Stay here until ....(Health=100% or Buff=xxxx)

My Fire Mage class can manage food (and this work good in wrotation). but with archeaology it sits (will eat, health<50% ), stand (will fight/grind/archealogy), sit (will eat health<50% ) ....and so on...

Only fight was a reason to break the regen/eat phase.