Edit: I am thinking about what you asked, I realized my answer wasn't helpful, I was talking about what I thought without really thinking about what you asked...
Jam_Sack wrote:I was running K3K until I could comfortably clear Duncraig. I'm currently lvl 133 now (SP) and I still haven't found a full set for my merc and sorc (Pantheon and Mysteries) after all these runs. How many clears of Duncraig should I expect to do before I can complete a set? Should I be farming somewhere else?
The best areas for those sets should be K3K or Duncraig I think.
One has Set Bias and other has Sacred Item Bias.
As for how many clears, it could be as short as a 1 minute run or as long as 10 years playing.
There is no way to really know, specially because you want two specific sets among many. RNG is RNG.
Jam_Sack wrote:Also, I'm about 350mf. Are there any other ways I can increase MF after socketing all my gear with Lums/Turquoise and MO'd with MF as well?
Some charms give MF. ( I think the Cow Level has mf Rolls )
You can use MF Cycles on Triune Charm.
There are 1-3 other late game charms that increase mf, I think The Sleep?
There is also the Trophy on Triune.
There are some unique jewels that give even higher mf.
I don't remember if Scrolls of Enchantment drop on SP, I think there is something about mf there too, but it's probably related to the Goblin System?
There are some really good sacred unique items that give a lot of MF.
But at 350% MF you are already pretty stacked, I recommend focusing on getting better stats, items and increasing killing speed.