This makes it sound like you're doing a different instance than the one I'm in... "spot heal as needed"? LOL.
Most of my healing was UE-Healing rain, and riptide on damaged targets, with totem (recalling at last second) and Healing wave if needed. I'd use surges if it got crazy, but most of the healing was taken care of by HST and rain/riptide, and I'd keep dps up to kill adds faster + returning mana.
Appreciate the info, but this is so far from my experience that it makes my head asplode.
I do everything you suggest: use (unglyphed) Riptide on c/d, HST on c/d (and recall just before it despawns), UE+Healing Rain on c/d.
During calm moments, like Wave 1, sure, Healing Wave will be sufficient. But when Oto has a Conqueror or Aqualyte, or 3+ of anything else, on him, I can barely keep him alive by chain-spamming Tidal Waved GHW. If necessary, I'll switch to HS, but that is not sustainable.
On the tougher groups, typically he drops from full to ~30% almost instantly (i.e. because I'm not directly healing him while I drop totems, HR, put Flame Shock on something, interrupt, etc), and from that point my GHW's just keep him from dropping further unless one of them crits. If I have to switch to heal somebody else who's also low, there is a very real chance Oto is going down.
Wave 2 is not one of the more difficult waves, all in all, but Oto drops to 20% (or dies) by the time the first mob falls unless I use a c/d for it.
In general, the more damage you can put out, the less healing you'll need to do. Added bonus of having time to drink if needed after 10/20/30. I actually didn't have time to drink after wave 20, but it was the only time ending a 10th wave that I wasn't at full mana. I think I was about 80% at that point.
Generally popping Fire Elemental + Stormlash and doing some Flame Shock + LB damage, on the last wave 10 mob has been enough for me to be able to drink. I pretty much always start wave 1/11/21 at full mana.
After reading your earlier post, I tried switching to Telluric Currents and doing more damage. Oto was dead within seconds on Wave 2.
The way I see it, the primary benefit of DPSing is killing the first mob faster. On a number of waves, after one mob is down, you can stabilize with HW + HR + HST (yes, there are exceptions on the waves where the next wave spawns before everything is dead). But before the first mob dies is when the damage is highest, and people are at greatest risk of dying (i.e. when I NEED to heal the most).
Also hard to see how Conductivity could be a gain over Rushing Streams. I have very high uptime on HR, but it's still only like 15% of my healing in there. With Rushing Streams, HST is more than double that.
With totemic recall, it's free damage dropping a fire totem, and free healing from HST if you make sure to recall them before they naturally expire.
Yeah, I'm doing that.