Far as I can tell, it's only the most F2P-friendly one in the sense that you can skip both the summon and the chase event, assuming you go all in for the training event and get the epic from it. Doing that and everything else, you'll end up with 3 Castigators, 4 Itinerants, 3 Misericords, 3 Ordinators and 1 Masamoto, allowing you to use the 3x4 rares to fuse the remaining 3 epics and also skip one of the Itinerant events (Dungeon I, Spider, Enhancement II or Arena II). That's what I'm doing, and since I already got the first 2 Itinerant events done, I guess I'll be skipping the equipment upgrades.
Other than that, it seems pretty standard in terms of overlap and work required. Though were the rares always at 2250 points in the specific dungeons? Doesn't matter all that much since they also overlap with the dungeon diving, but still. The biggest challenge, at least for me, is frankly just the time of year. I've reached the age when Christmas vacation is more work than my regular job.