Don't be afraid to scry away smaller creatures in favor of the chance to draw a finisher
If you ever wondered how it was back in the days of Mercadian Masques, Nico got the emotional answer for you in his newest blog article
Yes, Partner Commanders can be competitive at high-power and tournament-level Commander tables
The massive chaotic fun and little points of damage over time should build up to create a fun board state that slowly tings your foes
It doesn't copy whether that permanent is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on
And like all good moms, Mother of Runes is always there for we Commander players