I found if doing the Blue Mtn loop do it clockwise, its easier. I'll take the spring Cabin road to Tinsley and do the longer Tinsley climb back to Blue Mountain. The Swenson rock garden on Blue past Spring Cabin is tough or do it as figure 8 using the Tinsley as your cross over. That way you avoid the rock garden climb past cabin and or the Tinsley trail climb. I have a few routs posted on trailforks to help with ideas. Or check out my ride logs on strava/ trail forks.
Cartwright, upper Stony Brook and Tower are best doing downhill. Blue Mtn is rerouted onto pavement in one spot but not really a big deal. I updated rerout in trailforks as well as all the trails and woods roads.