J'ai trouvé sur un site anglophone la liste des skills pour les missions fb. Je vous en fait part cela peut être fort utile :

Gundam Extreme Vs Full Boost Skill
- HP
- Beam projectile defense up
- Physical projectile defense up
- All defense up.
- HP Regen (Self)
- HP Regen (Self AND Partner)

- Beam attack up
- Physical projectile attack up
- All attack up
- Melee attack up (Self)
- Melee attack up (Self AND Partner)
- All attack up.

- Boost attack at lower HP
- Boost gauge up
- Boost cancel's Boost consumption cost down (C button's boost)
- Step cancel's Boost consumption cost down (Rainbow cancel)
- Boost cancel AND Step cancel's Boost consumption cost down (Aka: both of the above)
- Ex-Gauge gain up(Self)

- Ex-Gauge gain up(Self AND Partner)
- Ex-Gauge Prefilled at battle start (Self)
- Ex-Gauge Prefilled at battle start (Self AND Partner)
- Assault Burst lasts longer
- Blast Burst lasts longer
- EX Burst lasts longer (both of the above)

- EX Burst+ (character sprite shows up, Burst break available even when you don't have a full bar)
- Team's cost bar UP (Max = +2000)
- Machine's cost down
- Friendly Fire damage down (both give and take)
- Barrier UP (with suits that have a barrier, eg Cherudim's shield, Crossbone's ABC coat, not sure if this applies to timed shields like Qanta or Nu's, or instant shield like Wing Zero EW's Rolling buster, Gold SUMO's UNIVERSEEEEEE)
- SP Gains up (Max = 4x SP gain, recommended to max ASAP)

Source : http://www.gamefaqs.com/boards/731138-kidou-senshi-gundam-extreme-vs-full-boost/68469874

Déjà Full Upgrader tout le monde , donc pour moi c'est trop tard.
Mais c'est bien d'en avoir fait un sujet.