With both of those mana-intensive Dinos on the board, your Apex Altisaur will only take one damage per fight, meaning you can win up to nine fights in a row before this big boy bites it
The absolute best way to double those tokens is different depending on your situation, but the universally useful Parallel Lives, Primal Vigor, and Doubling Season always work
Honorable Mentions: Earthbending Earthbender Ascension, Ba Sing Se, Toph, Earthbending Master are great examples of earthbending and a reminder that +1/+1 counters work beautifully because even if a land stops being a creature for a time, the counters stay on it until it leaves for another zone
Phoenix Down is available to help you here as well
Now that MTG Arena is getting some dedicated Commander cards, its hard to think that Wizards isnt focusing more on the format