At low converted mana costs, you can easily take advantage of graveyard setup creatures like Hermit Druid, pull different types of cards back to your hand with Eternal Witness, or even ramp with Wood Elves
If you'd prefer to pass your attackers around the table, generals like Karona, False God, Tahngarth, First Mate, Kharn the Betrayer, and Xantcha, Sleeper Agent will happily jump across the battlefield to attack on turns outside of your own
A: Singles for competition (best at weeks 2-3)
The exile ability goes well with non-exiling removal like Harnessed Lightning, giving you a one-two punch for killing The Scarab God permanently
As you are searching for upgrades, don't forget to look for non-Humans that support the Human theme, with Angel of Glory's Rise, Purphoros, God of the Forge, and Blood Artist being good examples
While these have redefined multiple 60-card formats, they're more tolerable in Commander