You're good to train right where you are
I farmed pegs from 64-67, then eg warrior/soldiers from 67-70. Had to take a break & trying to finish up farming by L72 on soldiers & occasional sniper run.
Skip the moles and the mole quests - they've got crap spawn rate! The smaller rooms on 2nd floor and up for pegs and eg warriors/soldiers are best places to train b/c of the high spawn rates - get a room to yourself and let the beatings commence.
If you stick with the caves at 70, hit yachas. If Takla, bone soldiers & niya guards. I tried nachals but wasted hella hp pots b/c had shoddy defense stuff...maybe will revisit them at 72 w/ new weapon.
**build your collection of tablets and alchemy items while you're at it - they dropped 8d tabs like rain for me.
Happy hunting!! You can dooooo it :::shaking pitchfork:::