Yeah well I recently had a lot of time on my hands and was able to use and abuse my copy of FFXII. I have to say that I am pretty sure I've mastered this game and I am only up to level 73 with my main character. (Other 5 characters 72,72,68,67 & 66) I believe its not just the level that makes you strong but which equipment you have equipped.
I completely filled out the License Board on all 6 characters so I can use any weapon and armor on any character. But I found out that using a one handed sword and shield is the best combo. There are a couple of "improve shield block" lores that severly upgrade your blocking ability If you have all the upgrades like I do, you can block almost all attacks. Even with Bosses, my 3 main characters with shields constantly block most attacks, even magic! I do have 2 characters without shields (one is an archer and one has the strongest weapon in the game, the Zodiak Spear, which requiers 2 hands) Plus with the sword weapon your attacks are constantly strong. With other weapons such as Axes or Hammers the damage you give is always fluxuating (I actually had a level 70 character hit an enemy for 9 damage 9!!!)
Another thing are the Espers, the creatures you can summon. To me they are totally useless. Great to fight and some are a real challenge but for actual gameplay and even the rewards I feel they are not worth it. I was able to get all 13 Espers but I never use them and after fighting Zodiark for over and hour my reward was 2 teleport stones and 1 Serpantine loot. Thats right, thats ALL I got for fighting this tough Esper for over and hour!
Anyway, I love this game though and I'm sorry to say but it's about that time I beat it and move on. I have been delaying fighting the last Boss in order to get all 13 Espers and optional bosses and even the Hunts. (I beat 42 out of 45 hunts so far) But it seems that the only remaining Bosses have millions of HP (Yes Millions!! one has 50 million HP!!!) and it would take too long to build up to Level 99 and fight them. Maybe after I finish a couple of other games I have I can always return to FFXII and fully complete it.
Since I stopped playing Magna Carta Tears of Blood to play FFXII I might go back to finish that game or I might start Kingdom Hearts II next... only time will tell.