I want to clarify: Gold League level deck. Not Gold Foil.
Ah... that is a bit different - still :D
It kinda sucks but...it's almost double the cards to go from Gold League to Max leveling.
And depending on the card, not really worth it. my "non-BL" are mostly not maxed, though I have a half decent DICE set too, with max summoners. The rest, almost nothing but key cards here and there.
That way I can play the one and hopefully rent the other. Probably not going to be worth much but...worst case is hodl and sell later.
I think this is a good way to go. I have done the same for a few cards, where I have a max that I play and a potential max that I have combined a little to rent a bit.
The hardest part for me is getting my lineup set in under 3 minutes.
lol yeah. I have come close to timing out, where I have to randomly choose cards in whatever order, just to get into the round.... rarely goes well :)