Yes, if you would be running solo 200 attempts, you would know it. The gelmorran shard treasures contain it way more often past 100. The runs are self sufficient if you don't ignore the treasures because you are scared of them containing mimics. HoH on the other hand is not, you have to spam 20-30 multiple times to get enough sustain potions, because the shards from hoh100 runs are not enough.
They only added aoe to rdm for low level scenario, everything else is the same. The aoe is useless for PotD, redmage is exactly the same as before the addon despise combat formula changed. So they think at least about redmage imo.
Most jobs will wipe at the 180 boss because the heal check at the end is too big. The best try for summoner is therefor 180.
The only guy that managed to get past 180 as something else than a healer or redmage, is a mnk on a jp datacenter who reached 184.
The changes required to make it soloable for every class but still keep the difficulty for redmage are difficult to make.... I know you want optimization, but propose a method to do it without changing the whole experience it had for several years