With a conversion stone, 5 glyphs, and an Amulet of Yendor you could hit level 9, or 10 if you converted a few more things, without fighting anything.
I hardly see the problem with this. Once he's level 10, a goblin is substantially weaker than any other race. Plus in your example you blew your preparation on a sensation stone. Yes, you could reach level 10 early, but you'd be significantly weaker as a level 10.
Stacking is just waaaay too powerful on normal/hard dungeons. lvl 3 or 4 just by taking conversion seal + sensation stone.
There are many preparation combos that are already auto-win on normal/hard dungeon. A bloodmage with fire magnet and burning heart, for instance, or a paladin with dragon shield.
Unless you're playing purist, leveling up in these scenarios is easy
and you should be able to reach level 6 or 7 before you even find
I just feel it's too powerful in small dungeons, but wouldn't be strong enough in the higher level dungeons where you always hit level 10.
Guess that's our fundamental issue. As it stands right now, a high-level goblin might not even have enough conversion points available to be a full level ahead of the other races (and he might not even be ahead at all after accounting for the extra bonus XP other races may accrue). Right now goblins only work on scenarios where you need to level up extremely quickly in the face of overwhelmingly powerful monsters... but no such level exists.
That would be the end of the Tower and Naga City as Vicious dungeons, for sure
It'd make them easier, but I doubt it'd knock them out of "vicious" range. So long as you ensure that humility doesn't grant a full heal if you already have enough XP to level up (which would be "double-dipping") I think it'd be fine, and it'd give goblins at least some
benefit from their racial bonus in these situations.