Surefall Glade, get some extra on those bears they don't want YOU slaying.

Kerra Island

if GMs see something beneficial , why not. It's a huge zone, would be great dungeon crawl..

But then I believe Velks or other zones would benefit more from a boosted ZEM, that zone has amazing camps

Paludal Caverns

Well, if you're on Giant faction you're not ruining anything. But also it does have a few rare niche items that people are willing to kill hundreds of mobs to get, such as https://wiki.project1999.com/Guardian_Robe (which many melee like to get so they can "dress up" as a caster).

Really though IMHO loot should be a negative factor: the best zones to improve the experience in are the ones that don't give good loot to make up for it.

Teal goes to Luclin.

I haven't been to chardok 2 but from what I've done of chardok 1 it seems like a good candidate. Like the hole it seems to be both large and to have diffuse loot instead of a few high value spawn points.

LAKE RATHETEAR

Mid-Late 40's xp options are a bit thin. My vote would be to at least bump up Lguk and Solb to something respectable. Not the worst zems in the game as they stand.

Velious zones would be my vote, with how hard some of the mobs are, it should have a larger exp trade off.