SoW is still BiS - as it's the only trinket available that has a scaling ability that far outweights Int/SP loss.
The 4T13 bonus and mini-burns are further exemplified by it's mana reduction/haste use. Sims while a great tool can/will be wrong from time to time. Living/Breathing by them is asinine; you'll notice many top players of various classes frequently going off the mark that sims would suggest.