For metalings, a flee of 120 is sufficient if you want to level on them and not get pwned hard. Also, make sure you keep at least 500 health, because MAMMONITE bam dead. And it's quite possible to grind at those metal things till the 50s.
The Killer's Requiem - NaNoWriMo '07
----------------------------------
Third Sight (main) - 5x/1 SG (soon to be blind!)
Zephyros - 5x/2x Assassin =P
The Last Requiem - 23/16 Thief (Gank Rogue to be)