Bonus Front Line XP - How to get?

[Kurogaea]

He's referring to increasing the loss bonus. So every 3rd place loss is an additional xp bonus boost (which you still retain if you get 2nd place, but don't increase), and it all resets if you get first place.

Ah ok, didn't know that it wouldn't increase if you had 2nd. Thnx dude.

[Februs]

It could also have been your challenge log. Weekly challenges reset on Tuesdays. You get bonus Exp for participating in 7 FL matches and winning 3 matches. It's a nice boost that usually contributes to pretty good chunk of your rank progression if you get em. The sames challenges can be claimed for Wolves Den as well... that is, if you can ever actually successfully que for it.