
Originally Posted by
Fethend
Apologies if this was covered recently, and I simply didn't see it.
I seek clarification on your rotations. You list T1 + B1/Scathe as being best. However, if you have the requisite 251 peity, then you can easily maintain T2 + B1/Scathe.
T1 lasts 18 seconds, T2 is 21 seconds. With your weights, I end up with a BiS resulting in 537 Spell Speed, or a GCD of 2.31 seconds.
Scathe/B1(2.31) > F3(4.62) > F1x5(16.17) > B3(18.48) > T1/2(20.79/21.25)
So there's almost 3 seconds with T1 where you simply have no Thunder active, and a quarter of a second if using T2. This assuming you have bad luck, and not a single proc.
T2 has the potential for 55 more potency than T1 and has 5% more potential for a proc, through an extra dot tick. Now, to give T1 credit, it allows for better chance of B1 after the T1. However, it's not guaranteed. And, assuming 120 potency for Scathe ((80% x 100) + (20% x 200)), B1 is only 50 potency higher anyway, less than the bonus from T2.