My mage is currently level 1371 in realm 443 and wanted to share some insights about several issues at this depth:
There is just too much loot. I spent a lot of time deleting minor sigils and spell scrolls to keep save game size in check (sigils have gotten better after the patch but still grow to over a hundred pretty quickly). Furthermore there are enough ticket and quill drops that I could go deeper just by using stop time/windwalk to loot chests and using tickets to complete duties. Currently I have 408 bronze, 75 silver and 60 golden tickets, though I only use them for diffuse duties or to skip sorcery realms. My suggestion would be to put a hard cap on consumables, cores, sigils and scrolls and instead fill the void with currency drops (either exalted emblems or something new) and have a vendor sell useful items like pills, dust, high-level orbs at a really high price.
Percentage based abilities without a connection to a creature’s stats make stats obsolete. The worst offender is the Mouth of Hell with Final Oblation (the core creature in my current team). Since it scales based off enemy damage its own stats are not important. My current fights all follow the same pattern: One enemy attacks, all enemies die because they take 10 million damage each.
My suggestion would be to have percentage based abilities scale of stats. In case of the Mouth of Hell I would suggest that base damage before being multiplied by 2.5 can not exceed the maximum health of the Mouth of Hell. It would still be immensely powerful but it would no longer one-shot a team of realm level 443 enemies.
Other creatures which are problematic are
Witch Doctor Sacrificer -> can only reduce damage up to its own maximum health
Troll Arsonist -> damage can not exceed x% of its attack stat
Ominpotent Deity -> damage can not exceed x% of its attack stat
Mutated Crypt Bat -> damage can not exceed x% of its attack stat
Cursed Reaper -> damage can not exceed x% of its attack stat
Mummy Lord -> can only reduce damage up to its own health
probably a few more
- Some abilities like Topaz Attunement do no longer work at these depth (which is fine, but should be clarified in the ability description, for example “increases speed by 10000% when determining queue order”