If you open with swiftcast shadow flare and use raging strikes after then your shadow flare is not being boosted. Personally I open with RS, B2, M, B, fester during the bio GDC then SC SF and use rouse and spur during that GDC. If you want to be the most efficient after that you'd use Miasma 2 and contagion before getting into the ruins and fester just before the RS expires. It's the most optimal opener without using pots imo.

In fights where you can, use auto attack (T6 and 8 for instance), weave your off-GDC skills in during GDCs, like fester, aetherflow and the pet buffs. Personally i save enkindle for a situation with adds since very few fights let you use it twice anyway and I'd rather make it more useful when I do. Use mega/X int pots whenever you feel would be best (I do for the 3rd of the first set of adds in T7 for instance).

Also don't clip your dots like that. Recast Miasma or Bio2 whenever they have about 3 seconds left, and re-use Bio right after it drops off and put shadow flare back down once those 3 are up. typically in a fight I do B2 M B then when those are wearing off I end up doing M B2 B and my timers tend to line up so I can B2 M B next time around and keep the timers simple. I do 300+ in all SCOB content, with my most recent T7 run with me as the kiter doing 295DPS, with a top of like 330 or 340 when I wasn't kiting (a luxury I haven't had in a while)

We're also on the same server so maybe I can see what you're doing sometime and get an idea of what's missing.