Solo Cloud vs. Bahamut FFVIIR

Weapon: Hardedge with maxed physical power
Armor: Astral Cuff because most of Bahamut's attacks are magic damage
Accessory: Fury Ring (increases damage dealt and received by 30%)

Materia:
Parry - initially I overlooked it until I realized you can stay in Punisher mode and still have the ability to dodge with this Materia. It is also much easier to counter because you can basically hold block the whole time.

Chakra - great source of heal, doesn't require MP, quick cast makes it unlikely to be interrupted

HP up - two HP ups to get your HP as high as possible

Barrier - using Manaward or Manawall if you can afford the ATB will pay off in the long run because you won't need to use Chakra as much

Steadfast Block - to further mitigate damage, considering you're blocking for most of this fight.

This fight wasn't even close to perfect. I am not a professional gamer or a speedrunner. The Parry materia really made this fight a lot easier. There are only a few attacks that can't be blocked and for those it is smart to use Counterstance for some amazing damage. Aside from the grab, the two lobbing balls of death and the divebomb, everything else can be countered with Counterstance so the tactic was to block, use Counterstance on the abilities that can't be countered otherwise and use Parry evade on the three attacks that have to be evaded.

This video was made with Clipchamp