LogFAQs > #942492583

Fairly certain it scales up according to the level of the pass 1 > 2 > 3 > 4 > etc

Let's see. My record says I've had 73 Battles and I'm Level 11 with 7 to go to 12

0 > 1 - 1 Battle
1 > 2 - 3 Battles
2 > 3 - 6 Battles
3 > 4 - 10 Battles
4 > 5 - 15 Battles
5 > 6 - 21 Battles
6 > 7 - 28 Battles
7 > 8 - 36 Battles
8 > 9 - 45 Battles
9 > 10 - 55 Battles
10 > 11 - 66 Battles
11 > 12 - 78 Battles

So it checks out although it's slightly off. I should have 5 to go to 12 not 7. So maybe it isn't that? Going up in 10s wouldn't match either though.

Anyway, if that's the model then it's 210 Battles to Level 20. 8 days worth of tags is 96 tags if kept on perfect cycle of usage. So I'd be well short of the 210. Notably the reward for Level 19 is 800 Gleamstones so if you're close it's definitely worth using refreshes to get there.