You can take a look at my rotation for Single Target fights, it might help in your output. I only have the helm n neck legendaries on, iLvl 900.
Start: Pot, pre-cast 2xWrath (about 2-3 seconds before pull, depends on your distance too), use CDs, apply both DoTs, cast all Moon Spells, 1xStarsurge(SS), 1xWrath, 1xSS, 1xWrath, 1xSS, 1xWrath, 1xSS, 1xWrath, 3 Lunar Strike, (reapply DoTs if needed) / cast Moon Spells when there's 2 stacks, repeat.
For AoEs, just save up for 2xStarfalls. You may use 1 at the start if it requires you to move, if not just use 2 at a time (>80 solar power)
