How many giants do I need to make sure the healer sticks on them? (AQ....)

Tl;dr
Why on earth do heroes have such a high aggro on healers when heroes get only 50% healing?
How many giants/housing space of troops do you need to get the healers to heal them over heroes?

I was doing a giant-healer-hog attack in clan war, set down the 6 cc giants and put 3 healers, then some wiz and the aq. My wall breakers miss the compartment, then a tesla pops up and draws the giants away. I thought never mind, it should still work out. Then, a mortar hits my aq and all 3 healers decide the aq needs the healing more than those 6 giants :facepalm:. I pop the lv 5 AQ's ability in an attempt to get the AQ back to full hp and out of aggro, but the healers refuse to go back to the giants, meanwhile, a dragon and a wizard annihilate them without any healer support. It practically cost me the 3 star from what would've been an easy base, and I was lucky to be able to scrap the 2 star with my remaining 5 wiz, bk, 20 hogs and 3 heals/1 rage.


Seriously, AQ's aggro on healers need to be reduced, the healer doesn't have much of a sight radius as it is and considering the AQ has a 5 tile range and stays about as far back as a healer, it's very easy for raged troops to lose the aggro of healers when they need the healing most.

(Staying away from general as it's being flooded with spam bots too much, it's still some strategy anyway)