Marchesa's Group Shove (EDH / Commander)

Group Shove is a play on the Group Hug type decks. Instead of playing nice and helping everyone (only to stab them in the back later), this deck is aggressive towards all opponents simultaneously and equally. This deck shines in large multiplayer games (4+) by focusing on group life steal and group aggro. Since this will single the player out as an informal "archenemy" it also includes sub-theme mechanics to give incentives to attack other players and increase cost to attack you.

Queen Marchesa gives us the monarch mechanic which in turn gives a free card draw at upkeep and if you do lose monarch status then someone else will be a target for combat. The hasty deathtouch assassin tokens generated by her when not monarch will give good value as well. Her low casting cost means she can come out reliably and often.

I've focused on group life steal effects as the main theme with cards that amplify this effect. Shadowmoor block "doubling cycle" cards like Boon Reflection and Wound Reflection speed things up nicely and Exquisite Blood combos with Cliffhaven Vampire or Vizkopa Guildmage. In a multiplayer game (my playgroup usually plays 4-6 player free-for-all) this can quickly get you tons of life. It won't perform as quickly in 1v1 or 1v1v1.

Sub-theme mechanics such as myriad will allow you to attack everyone at once and melee will pump your attackers when you attack multiple opponents. Sadly, myriad tokens don't effect melee bonuses since they came into play AFTER the declare blockers step, BUT the myriad tokens' comes-into-play abilities DO trigger. Multiple token generators like Ob Nixilis of the Black Oath and Teysa, Envoy of Ghosts give you beat sticks for melee pumping.

Another sub-theme is making it more costly to attack you. Ghostly Prison and Norn's Annex type effects will make it costly to attack you.

What do we do with all this life? Aetherflux Resevoir can one shot most individual opponents at this point (even if they've been gaining life of their own. Sorin, Grim Nemesis can make ridiculous amounts of lifelink vampire tokens and Ajani, Caller of the Pride makes us as many cats. Most opponents' life totals will be so low at this point that you'll have multiple options for killing everyone in a single attack phase or a pumpable sorcery like Debt to the Deathless.

I've got a large Maybeboard for this deck and would love some advice on specific cards from THAT list that should have been main decked and which cards to take out to make room.