"Note: If you haven't already done so, take a visit to Solanae Dyson Sphere and then when you've entered the the Allied Zone, don't move, check bottom right hand side of screen for one of the tabs called "Space Battlezone Contact" (Undine) - select this tab and when warped in, move forward a bit into the guarded/shielded area nearer the USS Cheron, Open the Doff Assignments Tab on the right side of screen, a Battlezone Tab is now available on your Assignments Window (only while in here).
They have greatly increased the amount of 5 hour Doffing missions giving 638 CXP per mission - used to be only 3 available, it now can be up to 20-ish missions, very handy if you log on a few times per day and if you crit a few daily, nice bonus to EXP/SP. A lot of these are available a few times per day after completion of previous ones, although this seems to vary per character atm, I haven't quite worked out any cooldowns yet.
While here in the Battlezone or in Allied , also check your Current Map Tab, scroll down to/near bottom, there can be one or two missions available, generally Development/Recruitment that can give 2911/1853 respectively CXP for a 12 hour mission - critting these can get you anything up to 20+K CXP.
Be sure to keep ALL your Commendation Points lower then you would normally would, because you will often get anything between 2-5k for each assignment and sometimes much much more."