I am a holy priest that's increasingly asked to DPS, and I have a question regarding Theralion's Mirror and the opening rotation that I haven't been able to answer myself.
Since the Mirror will proc most likely within seconds after the start of a boss fight, would it be a DPS boost if you open with Mindflay (or 2) instead of VP/DP/SW:P to ensure you have a Shadow Orb available as soon as the mirror procs?
When testing on dummies, I found that when I open with my DoTs, I usually miss seconds of the initial Mirror proc just fishing for that orb to get ES started. I guess a VT can go off if you pre-cast before the tank pulls, but what about the rest? Are the GCD of DP and SW:P worth it?
So, does Theralion's Mirror make you change your openers or do you stick to: VT, DP, SW:P, MF till Orb, MB, recast VT, recast DP, MF to refresh SW:P and get a new orb, MB for ES when TM is about to end, recast VT&DP before ES ends? This is all assuming the mirror will proc almost straight away at the start of a boss fight.
Since Theralion's Mirror power is purely depending on recasting ES after it procs, I feel with the standard opening rotation you miss a lot of the potential of the trinket. Is this correct?