QUOTE(lroumen @ Jan 31 2008, 06:16 AM)
Critical Strike does not last very long and if used at the wrong time it can be rendered quite useless. Granted, a Kensai with Critical Strike cannot be beaten in damage.
Without Critical Strike, we would have to make a calculation to see whether the Riskbreaker increased critical hits beat the Kensai thac0 and damage. Probably not, but the Riskbreaker may still be quite good considering that Critical hits don't have an AC check.
I have experience with the kensai. I played one as the hero through IA 4.2. In IA 4.2, I installed all the mods that Sikret suggested, and one of those mods extended the THAC0 charts if I recall. I know that my kensai rarely missed in ToB and even hit the hard targets in SoA much more often than the other fighters. The mathematical formula for the comparison of two classes damage is relatively easy to make. The comparison will vary with the target's AC and can be plotted. There are already computer programs available to do such comparisons. What that comparison doesn't tell you is how often during play will the kensai miss and the crit strike of the vagrant hit and does this happen often enough to matter. (Or it doesn't answer this question unless you know the quantity and ACs of all your opponents.) I found that PfMW and Absolute Immunity are far more frustrating than AC to the kensai. Personally, I am confident that the kensai has the most effective offense.
What I do wonder is just how much a liability is the riskbreaker at low levels. I also wonder if at high levels his special abilities are enough to make him a superior choice to other fighter types. I would say - maybe. I'm actually contemplating using a riskbreaker in ToB for a while just to try him out. (However, as I am doing so many different things now a days instead of just playing IA, it will likely be months before my game progresses to ToB.) Unfortunately, it seems that no one has actually used this class to advise the rest of us concerning its potential.
In contrast, almost everyone, myself included, jumped on the vagrant bandwagon. I imagine everyone did it for similar reasons to me: (1) get to experience more cool quests; (2) vagrant is a tough character; (3) vagrant gets to use some super IA items; and (4) vagrant gets a free super summons. It's hard to beat that many advantages. However, if Layeene attacks my vagrant like it attacked my kensai in IA4.2, I expect my vagrant to die just like my kensai did. I'll have to ponder tactics on that one. The Twisted Rune encounter seemed easiest handled by a multiclass mage, but surely a fighter or ranger hero can weather the storm too. (Last time the kensai hero hid while my sorcerer visited with Layeene. I've heard that you can't hide in IA5.) ...but I will post the Twisted Rune topic in another thread if I have problems.