Vazi is halfway between a group hug and group slug deck, helping your opponents cast spells, but ideally, being built so you can punish your opponent at the same time
It's always thought-provoking and fun to see what exactly went into the minds of the game developers at the time, and what the game could've been had these designs been a more standardized part of the game
Its not ideal, but its a practical way to turn your cards into something that helps you in the moment
Dealing combat damage with one or more of your creatures lets you proliferate, ticking up those poison counters and any other counters you have
That said, if you are still interested in the combo, the MTG Salvation brewers have been hard at work on the wonderfully-named TreesKaidekaphobia since late June
You can only ever sacrifice permanents that you control