I forgot to note the name of the person who detailed the limit breaks but you missed some spells unique to Selphie in the limit break which include one called Rupture (or Rapture, maybe theres two) but yeah her special unique spells are awesome I believe she may also get Exit. Generically speaking the spells are throwbacks to old FF spells from the older games with exception of The End.

Also Irvine, no end of game you should be using Pulse Ammo unless you have a guaranteed 9999 damage on a normal attack without junctions (devouring for strength will net you this eventually I normally just devour for 255 of everything anyhow) The reason I say this is simple:

Pulse ammo = guaranteed 9999 damage hit.

End battle Griever and junctioned forms of Ultimecia can obliterate your magic straight out from your stock including your junctioned magic. Therefore if you're using machine gun ammo you can't always deal max damage. Fight the Elnoyle in Esthar repeatedly for 2 energy crystals each time ammo RF will make this in to pulse ammo (also can be mugged for 1 or 2 more and carded to make 1 for every 10 cards, better to just play cards in a safe region for elnoyle cards. Brilliant exp too so if you're not level 100 and wish to be this fight which is much like the Dollet Tower boss battle will get you there quickly enough)

My personal party changes frequently I've done just about every combination possible and enjoyed it. I don't feel there is a weak character in terms of ability in VIII, unlike in VII where I felt Cait Sith and Vincent's limit breaks were not as effective as the other party members.