I'm with the rest on that. Optional dice.
While I'm an avid tabletop roleplayer, where dice rolls are the norm, I don't feel it suits play-by-post text combat very well. Usually in tabletop fights, the combat comes down to what items you are using, in which order, and where you are standing when you are using them. Then you take measures to increase or decrease certain percentages of your dice rolls for attack and dodge, or whatever, and the rest is up to the gods of random chance. 1v1 duels tend to result in back-and-forth slugfests with little to no -tactic- employed other than different maneuvers and whatnot.