Removal in Modern is just heavily slanted towards every deck having four to eight cards that kill Turn 1 Ragavan and away from whatever two-drop answer you chose that week
But in general, I would encourage you to be greedier here than you would be in other sets, so long as you have your solid core of early blockers to stall the board
There are 16 Collector Boosters included in the Deluxe Edition, which currently retail for around $35 each but were originally expected to cost in the $20-25 range
Ramp is also more important if youre playing casual Commander because youll likely have big expensive spells you want to cast as opposed to faster formats where the mana curve tops off at a lower number
Multiplayer games give cards time to generate value, which is why things like taxes, board wipes, and long-term engines shine there
Theres not a hard number that makes you safe in the matchup, but hoping two Chalice of the Void in your sideboard does the job isnt it