Currently, the options you get with friends are the same as in random matches, with you each picking a personal deck before facing off
Creatures (18) 4 Glorybringer 1 Darigaaz Reincarnated 4 Goblin Chainwhirler 3 Verix Bladewing 4 Nicol Bolas, the Ravager 1 Palladia-Mors, the Ruiner 1 Demanding Dragon Planeswalkers (4) Lands (24) Spells (14) Three mana planeswalkers have traditionally been Standard staples, and Sarkhan, Fireblood looks to be yet another
Ox of Agonas and its ability to discard your whole hand is a huge nombo with Conflagrate
Winter Orb and Static Orb are classic examples that will put your opponents in a blind range
Then you can make it a dork on a future turn to swing or block
Whenever a planewalker activates an ability, they either lose or gain that many loyalty counters