Rofl, just because it's on youtube that they use gambits does not mean that it is impossible to do it without.
First of all, it isn't 'Yizamat', it's 'Yiazmat.' I remember my fight with Yiazmat very well, and I did it completely without gambits. And, it lasted for well over an hour. Gambits don't do anything that you can't do yourself. They just make it easier for you to just use only one character. Like I said though, they have a slow reaction time in some cases and I just didn't like that. For example: the person in the video shown above was level 99 when they defeated Yiazmat. I wasn't. It was incredibly difficult, let me tell you that, but it wasn't impossible.
I know that I also did the same for the other three you listed: Omega, Phoenix and Hell Wyrm; but Yiazmat stands out the most in my mind. It truly was one helluva epic battle.
Way to be a fag. I have fought Yiazmat. (by the way that was a typo, I was typing fast) And when you are only level 55(or something I don't remember, I was not over 60 though) you need to use gambits. Otherwise you would have to level grind forever, which always ruins games for me. That was a video of how to beat him under an hour, they used gambits. Not the only way to beat him. I figured you would at least be smart enough to tell. 
Plus my back up characters were only level 16, I got really lucky with the Quickenings (some ridiculous combo like 30 or something). And I don't know if you used a guide like most people I didn't, I had about 10 elixirs and that was it I had no more Items after that either, plus one Bubble Belt. So unless you prepared for fighting him(which always makes me mad when people do because they know exactly what to do when fighting him and that ruins the game and there is pretty much no reason for fighting him if you don't learn to do it yourself) and if you left once you never really beat him, or at least he beat you once too. And I don't mean it like you die, I mean it like from now on the score will be 1-1. I remember having Ashe doing nothing but heal decoy and reverse the other two. while Vann and Basch tried to kill him. Took my over 4 hours. I really hope they never make a boss like him again, because he was just ridiculous. But that my nostalgia taking over, the point remains gambits are an essential part of XII's strategy and you never wasted time fighting the loser enemies because of gambits and mostly everyone was just walking around in the game.
You know, you can get offended and pissed off at me if you will, but there's no point for it. You said that for some bosses, you can not defeat them without using gambits and I proved you wrong. No need to get pissy and call me a fag. Yeah, I have a guide, it's Limited Edition BradyGames. Did I use it for the boss fights? no, I did not because I wanted the challenge of figuring the them out on my own. Yiazmat took me many tries to finally get the rhythm down and when I did, I kicked his ass. I fought the entire grueling battle out in one go and actually did die a couple times because I didn't know I could leave during it.
Seriously, don't get mad just because someone proves your statement wrong.
and the following is being posted in case you try to edit your way out of being wrong so that I look stupid. (some people are known to do this)
My answer to that. You can't not use Gambits, maybe on loser enemies, but on bosses like Omga, Yiazmat, Hell Wyrm, or Pheonix.
I know I'm almost full-up on the irony factor, but it's really not necessary to go that far in your public ostracizing. If you're going to quote in order to point something out, fine...but it's not worth it just because you think they might edit it out of their post. I mean, if your point is to point out their mistake then them editing it should be what you want.
~V_Translanka
