Get adamantite band, I remember I were able to get two, one for 50pp and one for 75pp. That's a total of 150hp which makes a huge diff, the lost MR is easily worth it a lower level. Also get the ikky gloves from WW, often lootable for free by goblin earring campers.
Also I think you are totally right about the AC, it really makes a difference when soloing/meleeing - use the AC buff too and you'll take a lot less dmg. HP is nice but losing it because of too little AC = wasted mana (especially from lvl 24)
Another nice solo trick I've used is getting a big 2hb - root/dot the mob and then med-tick/hit the mob.
[You must be logged in to view images. Log in or Register.]
1) Sit down take a med tick
2) Stand up hit the mob
3) Back off and sit down - Repeate.
(this can also be done when duoing, no root needed then)
Works like a charm and helps you keep hp and mana up and kills mob faster.