Solo Bosses will gradually change depending on the level you currently are but these bosses can be an excellent source of loot and typically are very quick to complete making it one of the easier Dailies to complete.

Potential Loot: Eagle Selection Box, Master Gear & Weapons, Barrier Crystals, Awakening Jewel, Jewel of Creation, Wing Materials, Equipment Fragments, Holy Water, Pet Evolution Materials, Garnets