Best Ultra LRR 15" Tires Available since Energy Savers are Gone?

I also haven't been able to find Mich Energy Savers in this size (Late 2022). I too would like to know how other tires perform - our 2019 Prius came with Dunlop Enesave-01 tires which we replaced at 42,000mi. (4/32in remaining tread) with another set of the same. At 65,000 total miles the second set is performing about the same as the first, ~63mpg indicated (~ 1mpg over true) when warmed up with mixed town and 65-70mph freeway driving in summers, up to mid. 70's on 55mph state roads over rolling hills and through towns in NY state and New England, and low 50's at 80mph on interstates, the latter varies up and down substantially with wind speed and direction.

Tire design has.a huge effect. between the two sets of Dunlops we tried Michelin Defenders for several weeks, they were fine in almost every respect but mileage dropped 18% with them and promptly returned to par when we exchanged them for the second set of Dunlops. Whether the Dunlops were new or worn hasn't appeared to make much difference in indicated mileage, though there should be some.