Manyu/Dragon
I'm usually running the event maps and if I get done early I will try to farm manyus for the priority girls of the moment, usually I attempt to level efficiently.
I don't try to farm dragons unless I need them and keep a stock of Large and medium dragons (as much as i can for the large and max of 3 per type for the medium).

Seeds/gold
For gold I mainly get it from event maps (80 stam) and use it all the time, if I run out of gold i use the seeds to do a massive amout of summoning (last time i did it i had like 250k seeds).
for the equip seeds i use them when i hit near 8k - 10k+ then hopefully I get lvl 10 gear if not i just use them all on event equipment.