So if your struggling with roll call heres a chill method I've found but its niche. None of this works on leftside as theres spawns on this platform. The first method is just bishop, where you stand on this right mid platform and doom and gen. I believe you kill enough of them that they will continue to spawn here for a long while. You shouldn't ever get hit. Second method and my favorite requires cr and bs. Put cr on this platform, have his pet up top. Send bs left, gen to tag mobs, come back right and on mid platform, gen again to clump up the right side with the left. Heaven hammer on cr into gen. Very smooth with maxed hh, bs only needs to dispell usually once after leftside gen. If you gen rightside before left its possible you get hit when jumping down and you will then have to reset your cr position.
Let's talk numbers, small sample size. maxed hh, 15 minutes = 500 mobs = 15 hearts. low intensity, being conservative could add another 2 channels for a total of 3 channels. I estimate it would add another 5 minutes per 500 mobs, so 20 minutes per channel per 15 hearts. this is after fully optimizing everything. thats 45 hearts an hour per channel. 1 hour = 135 hearts 2m ea is an easy sell from what I've seen could maybe do 2.5m. Some bottlenecks that would have to be solved if increasing number of channels would be having to wait for the mobs to clump, waiting for the mobs to respawn, a majority do respawn right away but some stragglers take a few more seconds. Thats kinda why I like adding more channels, while you wait for them to clump you could be tagging on other channels. In this clip it does look like I teled one too many times but they can wander to that corner, might be okay to stop 1 tele short. The strongest fire mage I know can still only 2 hit these guys, I think they have some ele resistance. If it is possible and feasible to one shot these guys then my method is probably useless. After the cwk buffs I'm sure hearts are a very in demand item. I wonder what method is being used now to farm hearts, dooming is such a turn off for me, idk.
Well remember thats if you can perfect this on 3 channels. You would need 3 pallys and 3 mages. On one channel I can get around 15-21 hearts so far in 500 kills. I will need to test more, still need to max heavens hammer but I believe 500 kills can be completed in 15 minutes. Also, not sure what you mean by x5 coupon.