Under The Red Cloud would easily have been my top album of 2015 had Maiden not released The Book of Souls. Very nice stuff. I've listened back through a bit more Amorphis now and agree, they have the balance just right these days, both in terms of music overall and vocals - ideal mix of growls and clean vocals.
Tree of Ages has gone from being "oh no, another folky sounding one" to a serious favourite, although I'm still quite taken with Sacrifice, as probably the most accessible one, along with the title track and Death of a King, which is a more recent grower. The Skull is a weird one, listening again now. Heavy verses but a sweeter, catchy chorus. But in all honesty, there's not a bad track on the album. I can't wait to see them live.