[SilkiyTea]

I do not believe ULTRASMASH is affected by +Phys from melee weapons.

At 237 power with a melee weapon against a DR heavy char, it did 3.5k damage.
At 237 power without a melee weapon against a DR heavy char, it did the same 3.5k damage

It had a difference of around 50 damage, but that can be attributed to the +3 physical pow element which, it does seem to adhere by!

Also, it can be used without a melee weapon! Precision Slash can also be used without a melee weapon as a heads up!