I got the Giant's Fist Achievement without even trying

[Eagle299]

I managed to get the Giants Fist Achievement without even trying. I was playing the Colluseum fight against Lightning and Amodar and managed to earn the Achievement just from fighting them. I haven't acquired any ultimate weapons. I just raised the stagger meter to over 900% and I think it was my Behemoth, whose been my main Commando for a long time now, who scored the 99,999 blow.

So if you want to accidently get it, a maxed out Behemoth seems capable.

[Skyblade]

I did it during the same fight, but wasn't using a Behemoth. My Commandos were Noel and a Munchkin (awesome early game Commando there). I believe it was Noel who got it (still 4 or 5 tiers short of maxed), and it was rather annoying, really. I had been carefully managing the damage against Lightning so I could end it with Munchkin's Feral Link (great damage, and a lot of hits, so it is a good one for finishing mobs off and getting the crystal boost with), when all of a sudden the 99999 just pops out of nowhere and all of a sudden the fight is over with that one hit. Was it a critical?

Oh well, nice achievement, little cost.

[Karifean]

I also got it without actually trying. I was fighting Long Gui, he was on the ground, deprotected and deshelled on 999.99% stagger and when stagger was about to run out, all three chars did that special attack you get in that situation (Scourge, was it?) and I ended up with a new trophy.

[Sword]

I don't even know when I got mine. I only discovered I had the trophy yesterday when I checked my trophy list.

[Loony BoB]

It was the last one I got. I remember Twilight Odin getting 92,000 (Stagger: 900%) or so when I was fighting the Long Gui for the fragment - that was Zantetsuken. I ended up using the guide's method to get the 99,999 instead of just doing Zantetsuken again at 999% though, mostly because I wanted to be certain I'd get it. I also wanted to get the full six ATB bars anyway, so it wasn't too much of an inconvenience to farm for those weapons.

I think I may have hit a 99,999 fighting Omega, too, without really trying.

[Karifean]

What is the guide's method?

[Loony BoB]

Use the six-bar ATB weapon on Noel, give him Bravery and Enthunder, get Long Gui to 999%, use his special attack. It also says to give him 4x Delicate Iron Bangles and to ensure his health is green (to ensure he gets even more bonus damage). It's pretty much making Noel as powerful as he can possibly be, I guess, and attacking an enemy you can easily get to 999% without killing it first. I'm sure there are other ways you can do it, though. If I remember right, it mentions you don't have to max out his crystarium when doing it that way, but I can't remember for sure (I'm at work at the mo').

[I Don't Need A Name]

I had to use the guides method to get it on my save. But I never use commando monsters, so that's probably why. My friend got it by accident from a maxed out Chichu

[Skyblade]

Use the six-bar ATB weapon on Noel, give him Bravery and Enthunder, get Long Gui to 999%, use his special attack. It also says to give him 4x Delicate Iron Bangles and to ensure his health is green (to ensure he gets even more bonus damage). It's pretty much making Noel as powerful as he can possibly be, I guess, and attacking an enemy you can easily get to 999% without killing it first. I'm sure there are other ways you can do it, though. If I remember right, it mentions you don't have to max out his crystarium when doing it that way, but I can't remember for sure (I'm at work at the mo').

I find the guide's huge reliance on High HP: Power Surge ridiculous. It gives a 25% damage bonus to a character with green HP (75% to full, IIRC), but that's it.

Compare to, say, Delicate Power Wristbands. Four of those, versus the four Iron Bangles, give a +32% boost to his Strength stat (which is his primary damage stat, unless you do a lot of magic boosting on his Crystarium) and Vampiric Strike 5% as well. It keeps him healed better and keeps his damage boost constant.

I mean, if you really need the extra health, maybe, but I find that Noel is frequently fully healed anyway, due to Vampiric Strike, and he has enough health naturally to survive even attacks from entities like Yomi and Long Gui without the extra boosting (and I haven't even started Chapter 5 yet!). So I'd go for the Strength boost.

[Lamia]

I got it without trying as well fighting Long Gui. I am not at max stats but I think I got it when I used Lightning's Feral Link "Army of One" when Long Gui was staggered.