Quote Originally Posted by Unregistered View Post
Here's a thought/question: given such an absurdly long rage gauge (6 million HP for expert, who knows what for ult, but most likely not shorter than 10 million), at what power level does Siegfried actually surpass Gilgamesh strictly in terms of getting through the rage gauge?
It's basically a question of when does 2 (elem atk relic) * 4.0-5.0 (overdrive's multiplier against raging) * 1.15 (I think that's Morale Boost's multiplier for shredding rage gauge?) every 6 turns (plus 40% echo burst if you're bursting during rage) surpass a single 3.0-4.0 (Gilgamesh's anti-rage nuke) + 20% current rage gauge shave every 6 turns? Assuming the ex slot isn't something from each other, so no Siegfried with Eternal Snake here, or Gilgamesh with Overdrive.
The very short answer is...

You won't be using either to kill boss in late game either way.

Siegfried only reappears in spacewhale endgame, and even then I'm not sure it's good for massive HP bosses.