Im going to be honest, Draftsim is a great starting point if youre inexperienced with Limited
There's not much point wondering about what spells are in his deck, Grand Larceny, since he's mostly going to be playing with other people's cards
Jungle Barrier is also strong, even though it costs twice as much
If an opponent were to try to remove one of your creatures you can respond instantly by sacrificing it, getting at least 1 mana out of losing your creature
Of course, this synergy costs an infinite amount of mana (nine total to go through the loop), which means it's probably not good enough, even considering that Yorion's blink synergizes with most battles, but the slight possibility of this mattering keeps Invasion of Xerex from F-tier
Hand size doesn't matter for the "Program" zone, and unless some other card was already modifying hand sizes, even with The Grand Calcutron in play, a player's hand size would be their starting hand size