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I recommend you use something like this to check for over/under extrusion

These cards are fundamental to so many Commander decks, which makes this group of trigger doublers powerful across a wide variety of situations

Be sure to build a healthy amount of card draw from white or black sources to keep your drain running smoothly and counteract the inherent card disadvantage when removal gets your permanents and auras

Black Innistrad is a world of horror

Not quite Craterhoof Behemoth, but I'm assuming you went with a treefolk deck to put the powerhouses on the sidelines for a bit anyway

For example, Yellow cards are good for buffing creatures and gaining life