On NA Server we have players from all over on several continents. The ping is already a nightmare for American players, it's even worse for our EU and Oceana players. Often making Dan Tests Impossible.
So here's my suggestion for a Mercy system:
Give the Advancement Test Helper a shop.
Put Loot Boxes and Selection boxes into the shop that contain Test Pass Seals. It works like the ones we've seen in the past from events.
Both will cost advancement seals, but the selection boxes will be more costly.
Make the seals tradeable and add a market for people who want to put in the effort for more than just Combo Cards.