First, none of these at-home tests can give you the same level of confidence as professional advice from a TCG dealer
That is, if in play testing you find that x number of lands is too few, but x+1 lands is too many, you can effectively play some number between x and x+1 (not exactly x+0.5) lands by playing x+1 lands in a 61 card deck
Use cost-effective packaging materials
Although powerful enchantments like Necropotence (then called global enchantments, which I miss, just a bit) could dominate the game in the 90s, auras (then called local enchantments, which nobody misses) were always a mistake
Serialized Guild-leaders One of Ravnicas best-known elements is its guild leaders, influential figures who command the societal pillars of the plane
Lieutenant abilities apply just once, even if you control multiple commanders