Here's the thing: DON'T wait for procs, and DON'T spam Split Shot.

Why do I say that? Because when I got the idea to use 1-2-1-3-2-3 (and please note, while I won't fully claim it, I hadn't seen anyone else suggest it yet, so there's that), I got it because I discovered that I don't need to proc Slug Shot in order to proc Clean Shot. . . THEN I discovered that I could sit on the Clean Shot proc timer and maybe proc another Slug Shot. And all this without Reloads. Best part about it is, if by chance I proc a Clean Shot and a Reload/Quick Reload comes off CD, I can simply transition right into that rotation, stacking procs and weaving in available buffs, and watch the damage rise.

Now to clarify: I'm not saying don't TRY to get procs in order to do more damage. But don't spam one attack purely waiting for a lucky 50/50 or a DPS cooldown to dictate whether you're really doing anything or not. Most importantly, TRY THINGS. It's a new job. There are no experts out there. And people are still getting a feel for it. We (MCH) went from being considered the worst DPS to now being accepted and welcomed in ANY content provided we can do our jobs right. And that's nothing exclusive to MCH at all; who would take any role that can't do their job right? So try things; you never know if you might be the one to develop a new, favored rotation or whatnot.