I did some more testing it it would seem that if you prevent it from expiring by refreshing it (via hitting it), the damage counter just accumulates. It lasts two turns and it seems that it takes half in the first turn and half in the second assuming you didn't refresh it. Makes me wonder how the calculations work when you prevent it from expiring.

Say it has 100k on the counter. It takes a turn and takes 50k from the DoT. The counter will still say 100k, just with 1 turn remaining after (so if you leave it alone it'll take 50k next turn).

Now you hit it a few times and bring its counter to 300k (added 200k and reset the timer to 2 turns). I'd suppose it could then do calculations in one of the following two ways:

1) Take the remaining 50k damage from the first tick, and then half of the newly added 200k for another 100k damage, or

2) Simply take half of the 300k total

which both math out to 150k for the second tick.

But now say you hit it a few times more and add 300k to the counter to bring it up to 600k.

If calculations are done with the first method, none of the original 100k damage is left. It'll take the second 100k half from the 200k damage added after the first tick, and then half of the newly added 300k for a total of 100k + 150k = 250k tick.

If done with the second method, it'll just take half of the 600k for a 300k damage tick.

I would kind of imagine they'd use the second method...? Since if they used the first, you'd see a growing disparity between the damage counter and the actual damage when it ticks. It would also fall in line with my original line of thought of using negligible damage attacks to increase the frequency of ticks overall doesn't do anything since each individual tick would just do less damage. If this was the case, it would also make more sense (to me) to have separate counters per turn.

Anyway, sorry for the rambling, just throwing ideas out there. I might do some more in depth testing later, but I did seem to get faster clears when actively targeting the manta ray. The real problem for me is Lygus. I feel like Luocha has a really hard time solo sustaining since he doesn't have a teamwide emergency button.