Judging by your gear and build you're maximizing serenity and SSS invulnerability time with the beacon, combined with some pretty impressive damage when you trigger an SSS, I like the idea of that :)
In a way though you're forced to do this by your gear. You lack the necessary armor, RA and life for non-combo builds, and you'd lose a sizable amount of DPS if you'd switch to a weapon with lifesteal - unless you can afford one with CHD and sock, but I'm guessing you'd have one if you could.
To me the first thing you should do is upgrade the amulet for one with more CHC, sacrifice some DPS for LS, and then stack more RA and armor. You'll be facerolling MP5 and up with any build you like in no-time.