Party vs solo: DPS figures assume your usual party (four party auras: Attack, Haste, Defense and Wisdom, plus 16% party vulnerable). Solo totals are about 20% lower, but each node's percentage gain stays about the same.
Planner estimate from your Combat Stats calibration, not a log result. Your General tree points match your Bow points but come from their own pool, so spending one never uses up the other.
After step 3 every pick is worth about the same (+0.17% per point), so the order of steps 4 to 13 is flexible. Aim adds nothing by itself (hit is capped), it is only a stepping stone to column 3 Malice. Path nodes give the same value as the regular nodes (checked against their tooltips).