Victim said:
The problem is that Deathless Frenzy, besides being broken by itself, breaks Robilar's Gambit by removing the downside of the feat. The penalties from the feat (taking more damage in melee via reduced AC and giving your foes bonus damage) are of no consequence when you basically immune to damage.
I place most of the blame on the Frenzy part though. If you can't actually be killed by attacks, then enemies who attack you in melee are pretty much screwed anyway. Enemies that can't go around Deathless Frenzy's defense will lose to you regardless. The only issue might be what happens to the rest of the party - if the foes spend time attacking you before everyone else is dead, then they'll come out okay. So the ability to kill them faster via a Robilar's exchange is not so significant. You're not going to lose anyway, so winning a little faster isn't that big of a deal.
Yeah--that's pretty well put. I had thought of it that way, and I really tend to agree, but Robilar's Gambit is good enough and easy enough to qualify for that it's become pretty ubiquitous in our group, and it kind of annoys me that it's basically a given. The example is a pretty extreme case, and it was just kind of disenchanting that the combat turned out the way it did when I didn't really intend to make an semi-invincible character. The plotline was really good and both the characters and badguys were deep and interesting, and it would have been more fun to see it go out in more heroic fashion than it did. Nobody in our party even got a turn at all...
I don't know--I guess I just think that beyond a certain point, it's kind of ridiculous for a character to get extra attacks just for being attacked. Say a 16th-level fighter uses his 4 attacks, hits 3 times, and doesn't kill a dragon. The dragon decides to attack him at +4 to hit and damage, and for his trouble, he gets his head cut the rest of the way off because the fighter gets an equal number of attacks (up to his dex modifier +1, so probably at least 5 with a pair of gloves by that level). The fighter actually has more attacks on the dragon's turn than he does on his own, and the damage isn't going to kill him. He slays the dragon in one round instead of two by virtue of the fact that the dragon decided to attack... I don't know--it just seems similar to stacking haste bonus attacks. If most monsters decide to do anything at all to you, it's basically a given that you get a bunch of extra attacks, which generally far outweighs the drawback IME.
I'm not saying that the Frenzied Berserker class isn't broken, I'm just saying that Robilar's Gambit is also perhaps a bit overpowered. I've seen it be ridiculously effective when used by characters across a wide array of levels and tank builds, not just this one.
*BTW--of course I know that AoOs receive the Power Attack penalty from the previous round. Because it's such a basic rule, I omitted its mention in the post above. I merely meant that the fact that easily causing foes to provoke AoOs (always at your highest AB) is a pretty good way of mitigating the drawback of using Power Attack, at least to some extent. IME, Power Attack is most detrimental when you factor in iterative attacks and their likeliness to miss because of the attack penalty.