ya my healer some time also cant lvl up coz EQ not enough high def. Healer basically no need any red pot and jsut blue pot enough.
If the place suitable for healer lvling, 99X5 blue pot can last about 12 hours+ if not suitbale....1 hours neeed to refill
Sometiem i reach to STUPIT condition where cant bot to lvling (high lvling place all mods aggressive) and dun even think about soem bug place where bot will become non aggrasive coz tehre will be coem ppl go there + kill u + lvling at there during mid night.
In order to solve it, i normally walk around the map and start looking a spot where got only 2 mods there
Healer onli can hit one by one <==== no eyes see
Another solution is make a swordman to party with healer and trogather lvling at 3 mod to 4 mods spot. (need to refill pot around 3~5 hours)