you could use the vampiric voidwoken model for the bat form.maybe it gives you access to some new skills while locking you out of others but increasing your lifesteal?
Ooh, great idea! Thanks.
I have to test it all first of course, but my idea is that transforming into a bat will basically lock/make your real body invisible, and you control the bat "summon". Then when you turn back ("dismiss" the bat), your real body is teleported to the bat's location and made visible. The transformation will all be hidden by smoke of course, to hide the teleporting.
As far as bat abilities go - much faster movespeed is a given, as well as a "swoop" jump ability to use as a self-teleport. Maybe some stealth abilities as well. Bat form will basically be a travel/recon form, as I don't imagine fighting as a bat would be superior to your vampire form. I may balance it a bit by giving the bat a smaller health pool.
The good thing about using a summon for this is that when it dies, you won't actually die. It'll just "kick" you out of bat form.
