tested the iron golems
the +0.5 tactical Scale Multiplier on the steel talon is overkill as the standard golem is really big already, if you really want to make the steel talon the biggest golem, than you should make the other golems smaller.
overall: you keep your line for specializing unit for different tasks:
tempered steel with its stat boost becomes better against single strong units, although he is missing defense against any non physical attack, it would really need it for that role
mechanized warrior: overpower is always good against numbered enemies, even if its only 50%
Steel talon: i see their main strenght to be strategical, you can quickly get them where you need them with their 6 moves
I like the mechanized warrior and the steel talon, they make the golems quite useful, the tempered steel is not that much of an improvement since the golems are already good against physical damage, they miss any sort of defense against elemental damage and magic