i am running low lvl dungeons on my Scolar and my Eos or Selena is the main tank(if the tank does not know what to do) or i just end up pulling everything and tanking it.

the duty finder should have the potion to queue as scholar(healer, DPS or support) and summoner(dps and tank?) specaly for low lvls were class does matter much just as long you have a healer and a Tank
also you should be requerd to lvl slower because the way its now its to fast. pull more ppl to Dungeons and you have solved the Tank/Healer problem short of.