Hey Traebeles thanks for the guide.

Just thought I'd share my own experience with the level 3 tombs since that's all I did on the grind to lvl 16 lol.

This is at level 15 in a party of 4 (so it will be different to your numbers on solo).

Kraag tombs L3: ~152xp per run (average clear time 4m30s, depending on group)
Watcher's tombs L3: ~185xp per run (average clear time 5m30s, depending on group)