I had 200 coins before ttk dropped because I bought 1500 heavy ammo synths. Im already at 400 coins again. You can get some more heavy synths....just sucks that its only 3 now. Do some glimmer farming and max your glimmer, trade in all of your ether seeds for heavy ammos at variks, turn that into the faction you pick. You can also get speacial ammo synths, but those are 3 perrep or 5 per rep, cant rememeber