Situation of the Byzantine military in 1281

Nov 2014
How was the military situation of the Byzantine empire in 1281? At the point the Byzantines still has control of northwest Anatolia, and still had an effective army and navy, although it was very expensive. Did Andronicus Paleologus make the right call in disbanding the navy and disbanding the field army? What should the Byzantines have done to keep control of Bythnia? Howbwere the Nicean emperor able to keep their territories in Anatolia despite having a lot fewer resources than Andronicus Paleologus in the late 13th century?