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It allows you to dive upwards.
Do you even play this game?

You only need 1 point in Dive Roll Adv. to unlock Just Reversal, you've put 3pts in it >_>
Take them out and you've got a nice rounded 10sp leftover to mess with.
I'd use it to max out the 2nd...

lol. Nothing in the game short of a Pure-Fire Tree FO can match the DPS of Weak bullet...

Finally got a chance to see CT & WB stack on something. The icon looks really awesome :-D
[SPOILER-BOX]http://s15.postimage.org/qv70fvozv/pso20120917_111504_000.png...

I'd still like to know if Chain Trigger can stack on Weak Bullet. If it's been answered somewhere then I've missed it.
I can confirm that multiple Chain Triggers stack upon a single place though, so...

Yeah, what i meant was that i'd recommend building up the chain with a Rifle as a solution to the scenario i posted, where you need to move forward to close the gap - not in general. :-)
Hopefully...

Charged Aerial Shooting > Satellite Aim > Bullet Squall seems to be the best combo so far, and it's definitely the coolest-looking string too 8-)
For Chain Finish, I usually keep an identical weapon...