Warrior General Games

Or wait until lvl 22?

The entire guide of when to boost
Season 0: Level 1 (Day 48)
Season 1: Level 16 (Day 48)
Season 2: Level 22 (mid-season)
Season 3: Level 32 (Day 0, the xp penalty will be fixed with season 5 & 7 adjustments)
Season 4: Level 42 (Day 0)
Season 5: Level 53 (Day 1 or 2)
Season 6: Level 60 (Day 0)
Season 7: Level 69 (Day 1 or 2)
Season 8: Level 73 (Day 0)

Levels that matter
Level 1-40 50 XP daily for training
Level 1-15 625 Max Game XP
Level 16-31 500 Max Game XP
Level 25-29, 150 veteran XP per day
Level 32-52 375 Max Game XP
Level 30-34, 250 veteran XP per day
Level 35-39, 300 veteran XP per day
Level 40 up, 325 veteran XP per day
Level 41+ 25 XP daily for training
Level 53-68 250 Max Game XP
Level 69+ 125 Max Game XP

Boost just before 22 and you get the levels for a game if timing is right and rollover to 25 30 mins or so afterwards

It will also be determined by how many AEq you want (3 or 4), as some build plans require boosting on day 48, and others don't.

yes boost

always boost on 48 if you haven't already

otherwise you have to wait until L79 to catch back up again