What is the best use of gems?

I have 13,500. Thanks!

Quote from AYDONOVAN >> I used my Gems to get Tyreek Hill. Playoff Variety Pack

 Now that may have been a brilliant idea

Always keep 8k on hand for the Master Series & Season.

Quote from AYDONOVAN >> I used my Gems to get Tyreek Hill. Playoff Variety Pack

I used my Gems to get Tyreek Hill. Playoff Variety Pack

Hard to go wrong on the 200 gem stamina refills, though you always want to keep at least 8k around for unlocking special gauntlets/seasons.

i have been using it on stamina refills and used a lot on boom or bust ltd packs in the past.