What is the activation rate on the 2-4 sword? The magian multihits can't possibly be as proc-happy as every other multihit in the game, else they'd be dominating, no?
Current data on Dnc forum with Oa4 parazonium is 1.9~ attacks average admittedly, but you have to account for its low base damage, poor hit distribution, and unfavourable OAX effect.
In other words, yes, it's dominating, provided your mainhand sword is an empyrean/mythic or similar, due to its superior TP gain. Supposedly the +10 DA khanda is just a hair better than 2-4x for almace users, but its so close it's not really worth noting.
Now as for a mainhand, it's pretty terrible. :P