[Kiha]

Fire is a burst tree with a smidgen of CC tacked on in the form of overheat and firestream, you can't really kite effectively with just fire, and holy's only claim towards either thing is it's aoe and technically smite but smite is the worst homing in the game in it's environment, as it stops you in place for a good whole second or two. The auras that have tick heals are supplemented usually by controlling the rpb box so that you can sit back and force them to come to you, neither holy, fire, energy, or even cosmic which are all by far the easiest to have in the arsenal on the ether side encourage this behavior. The tick heal is negligible in the environment it exists in.

Magma arguably is one of the better trees that doesn't force you to deviate greatly from the aesthetic or element of holyflame while almost reaching the mark for control needed (it still lacks the actual CC one needs to get any actual use of the tick heal of an aura that has it). Even having the fire spells you use give you a weak tick heal while on the flames or on hit would tie a nice bow on top of the whole package for aesthetic and functionality.

It's as much an issue residing in the trees it requires as it is the aura itself, which is why all of this is strictly a pre-update suggestion. I don't know how holy or even fire will be after the update, and that could change how it feels/works in actual rpb drastically.