I'm currently experimenting with a Ultmatum based character... and amazingly it tends to work. The basic premis is use ultmaum and then freewill (or the otherway round), freewill protects you from the loss of 10% of your health each turn while ultimatum gives you a 95% reduction in damage... The only problem I have is sometimes when casting freewill the shield does not appear, and fairly quickly you then lose your health. I was wondering why this was; any help?
My damage comes from epiphany corruption and implosion also occasionally nightmare. Coma is used to regen focus and psychopath form is used to surrive after ultimatum runs out (it only lasts 20 turns but has a cooldown of 30).
The only downfall of this build is the ever important health loss per turn which coupled with overdrive is rather high. This is fine as long as the shield holds out but as already said: death comes quick upon its failure.
-95% reduction works with the shield i or it couldn't possible survive as long as it does; although the health lost per turn is taken out on the shield and that is not reduced (or so I conjecture)