forge of the ancients stack with dwarven hammer?

[Taqwus]

Mmm hmm. To get 100+ forge bonus, you either need an intrinsic +50 forge bonus (which doesn't exist on any unit I'm aware of, unmodded). If you have three arms (fairly unusual...) and a +25 forge bonus (not a combo that I'm aware of), you could do it with either 2hd artifact forge hammer and a dwarven hammer. Four arms, use both 2hd hammers, or 1 2hd + 1 dwarf + intrinsic +25 or better.

Of course, the Hammer of the Cyclops is only available if you either wish for it or if somebody finds and kills the indy Cyclops, and then manages to grab the hammer. It's a slightly superior (forge bonus is the same, but IIRC combat stats are slightly better) version of the Hammer of the Forge Lord.