In response to the OP, I would change the Raider's Earring and probably use a Thundersoul Ring instead of the Rajas as well. Rudra's has a 60% dex mod and 1% TA rate is pretty lame so I'd take a good pixie or thunder pearl in its place, especially since there is the consideration of SA + Rudra's since this is thief which gives the dex a two fold effect. Rudra's is basically Mercy Stroke +1 with dex instead of strength mod meaning the bulk of a thf's damage comes from the first hit crit and a thief won't get crits on the offhand or multi procs. If he's using AoA he has a 25% TA rate (Triple Attack rate merits are expected) which results in even quicker diminishing returns from more TA rate than without.
My favorite Rudra's build would probably look like this. I know the Jupiter's Pearl earrings are unrealistic but a set of thunder pearl is easy enough if you can find a goldsmith to make them for you (auction is overpriced). This is my personal "dream" build for Rudra's.