Ah your planning is just trash
My HR is 369 and this is what I do
I play whales and buy 20 gems from it.
After that I play Ch4 shadow mission which gives me 271 xp per tickets .
Since my ticket count at my level is 257.
So I get
257x271 = roughly around "69420"xp for one bar of refill
And now with that 20 gems I refill it 20 more times
So I finally get
69420x20 =“1,388,400” total xp.
It’s all about grind and some brain cell which u lack my dude .
Try to reach at my level .