Or you could use cards like Merfolk Looter and pitch big, splashy spells into the graveyard you can flash back for cheap, like Ezuris Predation, Clone Legion, or Insurrection
With Tasha telling you what to do, its clear you need to just dive in and get value where you can
1 Mutilate
Charizard GX - - HP 250 Type: Stage 2 Raging Out-GX Discard the top 10 cards of your opponent's deck
Obviously, she works with Bargain too A two mana 2/2 with Flash and Flying always makes the cut, so the fact that this will also chip in and make your opponent lose life while you play out other Faeries is nice, especially because so many Faeries are evasive that chipping in for one damage here and there makes it a lot easier for them to do lethal A three mana 4/2 with Menace is a decent starting point
Mixed collections there could be more of course, but also impossible to have a bgs 10 set because for example venusaur has 3 9.5s and im one of the three lucky and no graded better