CRGreathouse said:
It's worth less than a single sneak attack die when you have +8d6. Remember, you have to keep the second roll even if it's a 1.
At 7 dice is pretty much breaks even. You are right that the ability to roll a second one does reduce it slightly, but it doesnt reduce it by all that much overall
While the math is slightly off it still pretty much equals an extra die at +7d6, or at least 'almost' there.
I seem to recal another feat that gave +1d6 sneak attack die somewhere, but I couldnt remember nor find it so I dont like bringing it up. Anyone have UA? or a few other sources like that? (by 'like that' I mean sources I dont have

).
The psionics handbook version isnt an exact match, but it is something that is sometimes better and sometimes worse on average than a regular die (although in the normal 1-20 game it is usually worse, but since the epic feat was brought up naming a nonepic feat that does better preepic seemed like an ok move).
CRGreathouse said:
I agree that it's weak as an epic feat, but I still think +10d6 SA is worth more than 4 feats. Weapon Specialization is hard to get, and as such is considered 'better' than most feats (and certainly many/most fighters take it), but compared to 10/4 of a sneak attack die its damage is pathetic: +2 vs. +8.75. Yes, I understand the limitations of the SA, but a fourfold increase...!
Actually, I dont find weapon specialization to be a very good feat. It is limited and its use isnt great. However, it is one of the few feats to do what it does. I actually think weapon focus is a better feat by far, especially when combined with other feats.
4 feats though? I dont know how often sneak attack comes up in your games, but in the ones I have been in it isnt incredibly common. Sometimes on the first round of battle and sometimes when flanking. But those are hard conditions to reach, especially when there is a list of things a mile long that kills it. Even simple concealment. The higher the damage from it goes the more things that are around to nullify it.
Hence, it gets stronger but less useful. Weapon specialization is just as effective pretty much all of the time, so long as one is useing that weapon of course.
So, yes, a fourfold increase because one can be used effectively all of the time while holding the weapon (an easy condition) vs sneak attack which can be nearly impossible to use.
CRGreathouse said:
So you rate the progression at 2 feats, or +17.5 damage/feat. Wouldn't this make the fighter much better than the rogue? I mean, without SA fighters still tend to outdamage rogues against sneak-attackable targets, and this would just blow them out of the water.
Fighters have tons of ways to increase damage.
However, the problem is with point equivalencies. I dont see the sneak attack ratio for virtual feats to be anywhere near 4, 2 seems much more reasonable.
With those two the fighter could pick up a couple of other options or do some extra damage in the proper conditions. Roughly equivalent.
Take cleave for example. It is a single feat that can grant an entire extra attack now and then. Now, an extra attack means a chance at a whole hit of extra damage again. This feat also drops off in use at higher levels but does more damage. Very similar.
Sneak attack is 'very' conditional. There are quite a few items which negate it either directly or as a side effect. Tons of spells do the same. Various races and templates also grant this ability.
Given all of that, I think that 1 feat for a sneak attack die every 4 levels is pretty appropriate
