ToME: the Tales of Maj'Eyal

Is there a guide that discusses a suggested order of areas? I've got a summoner level 16 who's done:
all tier 2 dungeons
Nur down to the horror level (someone suggested don't do that level yet)
Unknown Tunnels
Ring of Blood
Golem GY

From looking at the zones in the wiki it appears that these are my choices:
Zigur
Dreadfell
Temporal Rift
Nur 3 + Sher'tul
Ruined Halfling Complex
Last Hope GY
Ruined Dungeon
Save Derth
Tempest Peak (after Save Derth)

Any suggestions? Or better yet any guide about this because I get the feeling I'll face this situation again at a higher level.

Thanks

Zigur? What? Do you mean antimagic? It's worth it, but only if you can survive the corruptor. Are you good against burst damage?

Nur3 is worth a try. You get a very nice reward.
Ruined Halfling Complex scales with your level.
Last Hope GY? - no. Do it last. Very dangerous.
Ruined Dungeon: go ahead.
Tempest peak after you get antimagic.

Save Derth is fairly easy with a summoner. Just use the tactic of flame spitters around the corner - check if they use flamespit, if they do stay around corner, if they don't it's probably safe to go around the corner.

Isn't everything fairly easy with a Summoner?

You should go down the Lake Nur. It's worth to get the reward.