What is the recommendation of running Leves on the DoL classes? For instance, let's say someone is a lvl 30 miner. Is it in their best interest to pick up lvl 25 Leves and up the difficulty to +4 or is it better to pick up lvl 30 Leves and leave it +0 difficulty. The reason I am asking is it seems the only way to maximize xp is to not grind on items that are higher level due to the lower gathering rate.

Even picking up a lvl 25 leve and jacking up the difficulty to +4, some of the items were lvl 32. With all lvl 30 DoL gear, the gathering rate was like 66% or something. When using the +gathering rate abilities, I was still missing a lot. I was surprised to see the leve wanting me to gather a lvl 32 item when the leve was rated at lvl 29. This was one of the Leves that is based on a rating (I.e. +25% xp bonus for getting 320 or more points).

Any feedback is welcomed.