First I'd drop those Lacuni for some good crafted bracers, if you have them. You'll get more DPS and more EHP out of crafted with a little luck. +movement is capped at 25% so you are wasting most of the bonus from them and IAS Isn't as important as higher char sheet dps for Archon.
I'd recommend changing your build around a bit too. I'd drop Blizzard for Frost Nova, MM for LL, and drop something for CM. If you're trying to farm MP10 it's likely Archon falls off on occasion, and without a way to refresh it you can't do very much without CM. To be honest I'm not sure how you can run MP10. I would expect the elites to kill you VERY fast and easily. I have higher resists, HP, and extra LS and elites in MP8 can still wreck me if it takes too long to kill them, and I have about 50k higher effective dps against elites thanks to my SoJ (though I logged off in different build last night).
actually I have no problem on act 1 killing bosses on mp10 I might have to hit and run the boss with reflect and dont get overconfident when they are down to 10% (I dont use blizzard on reflect for obvious reason) .. I have what I call the "Idiot" skill set build... I buff up.. rain blizz on the mob and half the distance between me and them... and I kill with my MM and if the mob include boss I pop archon.. and I just started using the Scoundrel and help even more in mp10 due to the Baruza freezing them. But I will load up on ur suggestion on crafting Bracer spend up to 50m and see what I can come up with