Very minor, but Forge Strike - Forged by Fire feels a little weird in its current state. Nothing about the nodes behind it (or even the majority of forge strike’s tree) care about fire damage. I realize that forge guard generally does like fire damage, but I think it would make more sense to move or change Forged by Fire to give a bit more flexibility. I ran into this specifically when trying to build a non-fire based forge guard.
My suggestion:
Change forged by fire to give +physical damage
Change temper to also give +physical damage
Add a node to the tree to convert all damage (strike and forged weapons damage) to fire, near temper