I personally would buy individual cards over packs as this games only burn mechanic is to burn cards together in order to get a higher version of same card. Also with them doing discounts like this they will constantly be diluting their own products meaning cards are going to get cheaper before going up if they go up.

They would need a pretty big inflow of players atm.
If you were buying packs id recommend rare packs as I recalled buying 250 epic packs just to see that my friend that spent less on rare packs get far more than me, but of course that is purely due to rng to an extent but maybe the volume more allows that to be true.
!PIZZA