whm weaving

[EaMett]

Dia is 120 base potency, 60 per tick. The Potency of Glare is 300 or 120 PPS. This means that for Every second clipping the GCD and not casting Glare you are losing 120 potency.

Overwriting Dia, 3 seconds in to weave a GCD is the same potency as having clipped your GCD to Glare + Mobility. 120 + 60 + 120. Double weaving it, you net a DPS gain over clipping the GCD of 120 potency.

Overwriting Dia, at 9 seconds is a complete DPS gain over Glare. 300 + the additional effects of SpS. Anything weaved with it is also an additional gain.

You do count the ticks that happened before the clip. The damage happened. You don't count the ticks that didn't happen.

Sorry it took so long to get back to the replies. I was obviously caught up in the expansion >.>

Regarding your math, Something is off, Dia instant is 120/2.5s (48), Glare+clip is 300/3.3s (90). So alone this definitely doesn't make up for it. You also can't count the ticks towards the total because you should take 100% uptime as your default. Any clipping you do of your dot will not change your dps output but it will eventually cost you an extra gcd later on in the fight. Thinking of it as "clipping Dia After 12s is a dps gain on Glare" is inaccurate because it's a dps loss compared to letting Dia fall off naturally; as explained above past 10 clips you'll spend an entire gcd keeping Dia up. For the record the potency loss from a clip would be around 18 pot (7) if I'm not mistaken (basically a tenth of a glare gcd minus what you get back from dia initial hit, and not 60 from the tick as you might think).
This means that Clipping Dia to weave calculates to (120 - (18*<number of ticks clipped>))/2.5. Which is even worse. The only time you don't get a loss from it is if you clip it less than 10 times in a fight or you clip it responsibly before a phase transition. But even then you're better off clipping your glare.

Just clip your gcd and ask SE to give you a dps ogcd to weave after your healing instants. Instead of healing ogcds.

Edit: changed numbers a bit because I forgot original dia pot when calculating the loss.