From 45 on, did leves in uldah (repeatable and no guild support needed).. w/reward bonus should equal to about 5k per leve (or 1k per synth if you like breaking it down).. keep repeating it until no longer avail.. grab guild support and head to grid, do the same thing over there.. can easily do 5 leves a hour which comes 25k.. not bad imo.. hope that helps

also there will be days where you can only do it one or two times, then becoming unavailable, but be persistant good luck w/it and hope that helps you