Don't Try to "Average Down" Without a Plan Buying more of a declining asset to reduce your average cost per unit can make sense, but only if you have genuine conviction that the asset will recover
Tavern Scoundrel can turn your coin flips into Treasures, giving you the extra mana you need to cast your big threats
Mars serves as an improved version of Red Card, scaling more effectively as your opponent scores points
It's really good against the item lock that you find in abilities, like Vileplume and Trevenant (XY 55/146)
With a population of only a few dozen of graded 10 1st Edition copies out of thousands of total submissions, the difficulty of finding a perfect Lugia is nearly impossible due to frequent factory print lines and a delicate surface that shows even microscopic scratches
Choosing some lower cost Angels like Holy Cow or Bishop of Wings into bigger Angels like Avacyn, Angel of Hope or Serra's Emissary might help