As you calculate, keep an eye on your opponent's Life, your own Life, the presence of opposing Blockers, and how many Characters you have, and use whichever the situation calls for.
Edgar Markov decks are flexible because of its Eminence ability, so protecting the Vampire Knight isn't necessarily as vital as with other Commander strategies
Sure, nothing is stopping the powerful cards you bounced from being replayed, but everyone will have the chance to take them as they come rather than being crushed by the might of the player with the strongest board position
If you're looking to wrath the board in green or blue, Nevinyrral's Disk is probably your best option
The card has a ton of homes, in other words, and its not just an extender for combos as it is in constructed formats
If you do, search your library for a planeswalker card, put it onto the battlefield, then shuffle your library