I don't think, I know it's a joke. Go to Mana or Gaia on JP and get to Diamond rank and then come back to the forums and tell me you can't be bursted within 2-3s consistently for the entire match. There is no defending yourself against people that actually know what they're doing. There is no zooming away. On JP, by the time I hit Diamond, I was getting killed in <1s consistently. You will die before you can get an animation off after purify, you can horrid roar the entire team as DRG for a 50% damage reduction and still die before a polymorph wears off. Every single WHM LB, Every MNK LB, Every MCH LB will be combo'd with some other team member to full life you with 0 counterplay and you will have to deal with that potentially 10+ times in a match, consistently. When I say NA and EU is trash, I mean I can go into Casuals on Mana and find regular unranked people better than Gold and Plat. They play the game fundamentally different to the point other data regions look like they're toddlers playing with Lego's without a context of what they're supposed to build. You're just clanking pieces of a pvp kit against each other and having fun, but you don't understand the full potential of what you have yet.
That aside, If a WHM and AST healer can't save you, that heal ain't doing nothing. That heal isn't stopping a DRG+RDM LB full life of 3 people on your team. That heal isn't going to let you 3v5 the enemy team and not lose crystal progress. That doesn't stop the triple WHM LB's. That doesn't stop the Ninja rampaging with Death Link. That doesn't stop the double and triple kill Samurai's. It might help you barely live if you're 1v1'ing a MNK trying to LB combo you because the damage is delayed, but that's not going to stop high ranking people from being wiped and getting wipes to push the crystal. The majority of crystal movement isn't done in skirmishes, it's done once 2 or more people are dead, which happens mostly from LB's in high rankings. All they did was give you a pocket semi-nerfed AST on your team, so anyone used to bursting through AST heals isn't going to care about that HoT. If you're used to dealing with 2-3 healer comps, you're not going to care.
Yes, it's a counter to scholar dots, but scholar dots never did anything regardless damage wise.They're just padded aoe damage for the scorecard like the SMN aoe field.
And the reason someone has to be alone on the crystal is because that's the main route. Who cares about the enemy team camping your spawn if the crystal isn't moving. They're going to have to leave that healing area to be close enough to the crystal path to actively fight. At which point, either bursting efficiently or guard stalling can run out the clock as counters and the ranged members of your team will be able to go and pick up the HoT mid-fight while still contributing enough. It's mainly melee's that would be out of position from having to go and pick it up mid-fight.