The bare minimum I think is that Blue starter & Law T2 need slight buffs, and Black starter / Demon / Necro need slight nerfs.
@Hobusu related to what you said here, what if instead of raising DP’s gold cost you made it damage Vandy directly. Like deal 2 damage to your base (only your base, no more using it for finishing the opponent) and 1 damage to Vandy. I think you could leave it at cost 0 there, give Deteriorate 1-cost, and hit Garth in the stats maybe? (move his midband to level 5 and take 1hp off midband? makes it much harder to set up nasty maxband fetches)