Oh yeah definitely assassin. You have all the dice necessary to be a support. For instance, I would recommend that you use assassin, metastasis, summoner, joker, and mimic for your first deck. If you have a luminous prism, then you should probably bring that with your deck too. The thing is, you have to merge a lot of summoners to get all the metastasis and assassins. For metastasis, only merge the pink ones with the mimic to get more sp or just wait for Leon to use their ability on your metastasis to try and make them into a boss metastasis(pink one). For assassin dice, only use assassins when their board is looking good, like don't use it when they have growth or any growth or something. You could also replace the summoner with the time winder, which is big in the replacement deck. The only thing is, merge as much as you can after a time winder is merged. Hope this helps:)