The gear is a reward for doing the specific raid.

Poetics can be earned from almost any instanced content level 50+ to one below level cap.

Let's not make the raid gear available for tomestones. If you want the gear, do the raid. It's not like there's a weekly limit to force you hold the tokens for a couple of weeks before you can buy the item you want.

The reason you have the clutter in your inventory is because you're not using the tokens. If you're not using the tokens, it seems like it's not the gear you're after in the first place so there's no point in switching them to poetics.

If you don't want the tokens in your inventory, don't roll on them (or open the chest if you're solo). Easy fix.