I know exactly how you feel, it's very difficult to gain some levels as a High Acolyte, especially if you already did all of the Overlook Dungeon exp quests as a regular Aco.
Your best bet would be to get Lv 1 Heal, 10 Agi and 10 Bless and find some other players in Overlook you can even share with (if you happen to be VIP)
This is how I managed to get Job 50 as High Aco.
Party'd with 2 different Ninjas and later on a Bard who helped me to get up to Job 50, while i buffed and healed them.
When you reach Base Lv 56, you can do those Collect Item sign quests in eden.
Most cheapest would be the "Sticky Feet" one, a bit more expensive the "Maneater Blossom" one.
It'll cost you around 2 - 3m zeny to get Base Lv 70 that way. (with 2x exp now, it should be only 1 - 2m zeny)
For non-VIP High Aco's there's only the generic Heal Bombing Undead monster way of leveling up, with limited SP and low SP recovery :S
And the best thing about this is, as soon as you reach Lv 70, after wasting so much zeny on the Meaneater Blossoms you gained through selling that Phen Card from the Overlook Dungeon, you won't get any of the precious loots from the TI's or Nogg.
You're just a heal slave, eternally even share dependend and struggling to gain enough income to afford Blue Gemstones to be able to revive players that pick up some goodies every once in a while, because they're the killers and don't feel like sharing at all D:
Had a Knight rumble about an OCA an Alchemist in our party picked up during TI, because apparently "HE" killed it and thus the OCA belongs to HIM >.>
Yup, we do not count in the revives, buffs, heals and status recoveries, since we get "free exp" for doing apparently "nothing", so no loot for us.
Was just too funny to be true, I left him lieing dead on the ground afterwards.
Edited by Morlord, 13 February 2013 - 06:50 AM.