Originally Posted by
Nairobi
50% uptime on a 3 sec buff means that 3 of 6 seconds it is present.
ShotR requires 3 HoPo, which we get from CS, Judge, and GC AS.
Using the "accepted" rotation of CS, J, X, CS, X, J, CS, X, X (which ignores/discounts any bonus HoPo from GC AS), you have 5 HoPo in that period (0-12.0 seconds). That means 1.66 ShotR casts in 12 seconds, or approx 40% uptime. Adding in haste means that your CD on these abilities is lower, and increases the amount of HoPo incoming, raising your ShotR uptime in the neighborhood of 45%. Factoring in GC AS, which is hard given its RNG nature, we can assume that further increases to ~50%.
Additionally, using HA, you can chain cast ShotR to stack the buff for upwards of 20 seconds of godmode.