Well, you could always buy a piece of armor and then NPC it. 30 Almirian seal thingies can buy you a 5* piece of armor, which can be sold for 30k to a vendor, no unbinding required, which makes fighting Vanaduke profitable (assuming you don't revive more than twice).

Tokens are a nice way to make money. For boss tokens, buy the cheapest yet highest star item possible and sell it. Note, for the Bark Modules, its more efficient to save up and sell the 3* Quicksilver armor set than it is to sell the cheaper 2* weapons.

For the Primal, Forge, and Grim Sparks, it's best to hold onto about 40 at a time. Brinks offers tons of rare mats that can be expensive through the Auction House... That being said, you can use the Sparks to buy the best selling Mats on the AH for a good profit. For example, the best conversion of Grim Spark to Crown is the Ghost Bell. They are 10 Grim Sparks, but sell for a little more than 2k at minimum. I've sold one for over 4k.

Spark tokens are worth at minimum 100cr each, based on 10k from vendoring a 100-token trinket. So for Grim Sparks, converting them to Ghost Bells for sale on Auction is worth it (just don't flood the market).

Seals are worth 1000cr each (30k from vendoring a 30-token Ancient Plate item), and Jelly Gems are 233cr each (3500cr for a 15-token Brute Jelly item)

Don't farm Snarby or Roarmulus (unless it's for a change of pace) because the tokens are worth relatively less- Snarby only yields 2* items at 750cr per 10 tokens, and the only 3* Bark Module items are 20 tokens each rather than 15.

There is also a small market for unbinding and selling Pulsars and other (relatively) difficult to get token items, but it is easily flooded and not really recommended.

Hey you're leaving out some of the best token prizes for those bosses, the bomb lines (dark briar barrage and voltaic tempest) from those bosses are some of the best in the game.