Hammerhand is a psyker power that grants natural weapons and upgrades you strength 4 times. this in it self is quite alot of damage if your psyker haves an average strength (30+). Burning fists (i think its called) makes your unarmed attacks deal 1d10+SB energy damage thus removing double armor bonuses from unarmed attacks and increasing normal damage.
Now consider these two powers combined! they are both sustainable so both can be active without too much penalty. This is (sorry for the choice of words) a shitload of damage from a psyker. And im not even including that this psyker could be Templar Calix advance to make him better in melee combat.
I have one such psyker in my group and frankly he's steamrolling anything i throw at this group (yes he alone). I tried using a sniper to deal some damage and scare him a little, but he's got sealwound and Regeneration so he shrugged it off pretty easily.
Have anyone else ever experienced this combination? Is it something you think should be taken into the Errata to somehow balance it betterm or is it just fine?