I solo boxed HoL yesterday, last time I was in was about 2 weeks ago and I wiped a few times on Loken and gave up. This time I 1 shotted every boss, it was all ridiculously easy. I did get about 100 badges (and spent it on some gear) in those 2 weeks so I'd say definitely wait until you are geared up a bit, it makes it a lot easier.

And yeah, putting totems down in the mid on Ionar, spreading everyone out in a corner helped a lot. I still had to single-heal a few people since they dropped below 50% when Ionar disperses, but never really came close to wiping with 3x healing totems.

Loken was easy mode too, got him down in 70 seconds (achievement is 2 mins or less, got that!). Stack everyone up, have nature totem down, he takes I believe 3 seconds to cast his AoE so at 2 seconds in I start chain healing on everyone, after it goes off everyone is back to full health and I just keep DPSing. Was a joke of a fight once my guys all had 15k hp and 17k mana.

Whats funny is my gear hasn't dramatically changed, maybe gone from 1200sp to 1500sp but that extra sp, crit, and HP/int really makes a big difference. My pally also went from 22k hp to 27k and tons of dodge/parry/block and that has made a ginormous difference, its no longer an issue of "OMGOMGOMG MY TANK IS ABOUT TO DIE", i can go long periods without having to heal him.