Shiva has sleepga which is a dark aligned spell and Leviathan has slowga which is an earth based spell. Their elements don't matter nearly as much as the concept. Titan is a defensive oriented avatar with only 2 wards currently. Stoneskin and a scherzo. Giving him a magic shield option shouldn't be that big of a stretch. Regain was mainly there because titan is useless most of the time... Which sucks because he is my favorite avatar lol.
I like the max HP ward idea for Titan though! A mini mantra could help sponge some high damage attacks.