Thanks for your feedback. Ambo’s + Doom is going to be trickier to play since you’re relying on Weapons Master and Ambo’s to generate Fury. In many situations, you can end up Fury starved, and when that happens, you’re dead.
For speeds where none of that matters, yes, Ambo’s is definitely better, and it’s also likely better in the top 1% of push attempts provided you’re willing to fish hundreds upon hundreds of keys for the perfect soft rift. Really, though, Ambo’s + Doom only really shines with the S20 theme if you can make use of the Season theme to wear FnR and put Zodiac, BoM, and CoE in the Cube.
Results from last Season, this Season, and non-Season testing indicate that both combos are more or less equal in terms of GR clears for most players, though truly dedicated players who are willing to grind several thousand Paragon, blow thousands of mats on perfect gear, and fish hundreds of keys will likely push the Ambo’s + Doom combo a little higher (1-3 GRs is the estimate). But again, that’s only for the most persistent players.
If you’re playing non-Season, I wouldn’t bother with Ambo’s + Doom.