Lore Tier 4 and 5 is up: Schemes of the Enemy. I forgot there's also a natural in the run, so it's 4 lore, 1 natural, 1 any in 2:05. This particular farm really plays into the build's strengths: No fighting, long stretches of running, and you need unbuffed jump of 40 and open lock in the low 60s. Plus there's a shrine right at the start for recharging the 12 sprint boosts.
There's actually another natural if you hang a left at the fire trap, but it would just add time and risk spawning a rare. There's really no point to slowing down for a natural in any tier covered by Breaking the Ranks.
EDIT: Yeah, initial testing shows Assault on Summerfeld may indeed be clearly superior to Last Stand. Too bad it's only for Tier 3, but hey, Tier 3 is the crucial one.
EDIT 2: Wow, 9 tier 3 naturals in what looks like 1:15, no fighting, in Assault on Summerfeld. That absolutely crushes Last Stand's 3 in 0:45. I'm hopeful that Small Problem can be similarly better for tier 2, and be the primary tier 1 farm as well.