BLM QoL suggestion

[Acidblood]

Thundercloud procs are actually two things in one.
-- The entire potency of the full DoT on initial hit.
-- Applies the regular DoT.

So it is really:
[70 + 390 + (40 * 8)]/ 2.5s = 312 PPS

That is only true if you aren't overriding an existing Thunder DoT; i.e. if Thunder is already up then you cannot include the full DoT potency (if any at all) in the base potency.

The question is around the use of additional Thundercloud procs; i.e. beyond those necessary to maintain 100% Thunder uptime (or near enough to). As such, it is of no benefit to consider the DoT portion of Thunder / Thundercloud (as it either applies universally, or does not apply at all).

Edit: For context the full 'standard' rotation, which gives 100% Thunder uptime, (and taken in the middle of a fight) would be:
B3 > Xenoglossy > Sharpcast (weave) > T3 (or TC) > B4 > F3 > F4 > F4 > F4 > F1 > TC > F4 > F4 > F4 > Despair > B3 ...