whats the best way to lvl up when...

[Alisha]

all your co's are on cooldown?

[Klashikari]

Border Break quest.

[Sasuga]

Border Break is the bread and butter right now.
just pop an exp ticket and stay with the group, restart it the second you fill up your points.
don't bother with the boss. It's the boss codes in the MPA that give the real EXP.
and with the recent change on dimishing returns now being at 11 lvls away...
BBLQ is best right now. Abuse it while its around

also, if the MPA drops below 6/12, just restart or join a fuller MPA, its a waste of time otherwise.