Add following exchange to NPC's:
2 Event Token -> 10 Supply Token
1 Iron Ridgeknife -> 4 Supply Tokens (reverse of what you do to make them)
150 EC -> 10 Supply Token
10 Perfect Element -> 10 Supply Token
100 Dragon Blood Stone -> 5 Supply Token
100 Flowsilver Coins -> 10 Supply Token
1 Epic Point -> 35 Supply Token
Also make Supply Token -> Guild Base materials/Construction shit so we can grind bases faster for legendary helmet because even the most OP PvE factions have not gotten it yet.
feel free to agree or disagree on any of these. The sources of ST are too small, and doing most of these can increase the value of most of these said items.