I think with any heat there is going to be damage, but it sounds like you are doing all you can to minimize it. If it makes it look good, and you are doing it every other day or so, I say no big deal. All of this stuff is good, but you have to be happy with how it looks, and so, go for it.
Rae ~ 2c/3a ~
Wife to a 3c Curly Guy
Mom to a straight and a curly.

"The Longer the Hair, the Bigger the Blob."

Porous, very dense but fine hair. Medium everything else.
CoWash: Tressemee naturals
RO: Generic biolage and generic joico k-pak
LI: Tresemee
Miss Jessie's Pillow soft curls, diffuse 50%, add KCCC and diffuse to 80%.
Always wash upside down.