If that style sounds cool you can add in Feather, the Redeemed for more ways to get your spells back and if you lean towards token theme adding Zada, Hedron Grinder will really scare the table
This thang is brokenly good
You can even force players to draw cards by dealing damage with Xyris, and when youre getting that many Snake tokens in a given game, you might as well throw in a snake-typal effect
On the other hand, if your opponent is very aggressive, and you can count on your opponent always playing the most powerful spell at the first opportunity, this might be an opponent you can use permission spells to good effect against
Theres one notable exception that I wont be including here, and thats any of the cat demon Rakshasa cards from the Tarkir MTG block and Mahadi, Emporium Master from Commander Legends: Battle for Baldurs Gate