This still works.
Levelled a Ret Pally from 82 to 90 using this.
82 - 86 : FOS runs (5-6 min per run). About 10-12 runs per level. Ran into multiple 10inst/hr lockouts..
86 - 90 : LCOT runs (5-6 min per run). Fastest levelling ever. No instance lockouts.
89 to 90 under 50 min unrested. Woot!
You get 57.3K XP even at level 89. Overall you get about 60-63K XP per run. Which is quite good.
Made 6k gold meanwhile by vendoring all the greens and blues.