The daily Rewards after doing Quest for 15-20 minutes are around 1.5 gems in grand Cross-terms the weekly Rewards you get for grinding 25 hours to get to world lvl 4 is equal to around 5 gems per week in grand Cross-terms.. Mind you this Game has WORSE Rates than grand Cross and gives you almost nothing in Terms of essence after Story. i stopped pulling for escanor with 26k Essence left(around 1 week ago) and all it gives me after playing daily is 2k Essence. THATS NOT EVEN A MULTI. This Game will fail or be heavily p2w as 1 Banner where you get shafted or wrong unit pulled or Power Creeped too fast and you can throw your Account away as there is No way to get consistently Essence in this Game. With the daily and weekly Rewards you would probably need to Farm for 6 months to get 10 Multis, which is a Joke.
If not 2.5x-3x the Rewards this Game will die quicker than it took to Develope the Game. (Christmas is D-Day until people either Play grand Cross again or somethingelse and give up the 7DS IP.