The Heroes' Rest fight is level 11, so you should be fine.
Yes it's possible to clear the Cullwoods Mill area and finish Saheila's quest at level 13. I went through it at level 12 on Tact right after Heroes' Rest. I didn't mean to start fighting but it just happened, so I went along with it and turned out the Cullwoods Mill fights weren't that bad. After clearing Cullwoods Mill I was at level 13 and moved on to the Blackpits area.
Last edited by Try2Handing; 01/02/19 06:00 PM.
