L4DANathan
Member
A single board can easily suck up all those coins, especially the ones you get at higher levels.
When unlocking nodes, prioritize AP, Cost and HP nodes. Both genders, every node you can unlock matters for your character. Only unlock avatar part nodes if they're blocking you from the first three. At higher levels, cost nodes fall off and are soon replaced by Chip/Dale/Cid nodes on the new boards. I would definitely suggest unlocking those because you can never have enough.
Oh yeah, I already had all the nodes prior to the first avatar item obtained for every board. Now I'm just going back and clearing boards entirely for completions sake. I've got 18 boards left at this point.