Optional battle boss teams (Colliery, Cloud Sidequests, etc) had their levels set to be fixed in the 40-50's level range.

Additionally, their Defense Up / Magic Defense Up innates are gone. They are still immune to the more ridiculous ones like Stop or Don't Act which would trivialize the fights. They are now vulnerable to more things such as Slow, Don't Move, Silence, etc.

Zodiac Monster Boss negative status immunities was altered.

I took special care to slowly increase their JP and skill selection as the player furthers the storyline. This prevents them from busting out ridiculous things which you haven't had the chance to learn yet.

Human Storyline Enemies JP Accessibility was lowered tons for Chapter 1 and 2.

This means no more fear of leveling too high early on and running into enemies with Crystal Gear from Chapter 4 and 200 HP and 10 Weapon Power more than you can field. For example, the Lancers in Zirekile Falls will bring Equipment that is appropriate for that point in the story and which is also purchasable by the player in shops at that point in the game.

Human Storyline Enemies will now bring items from the current chapter that the storyline battle is in.

Random battle enemies will still scale with your party's average level (just like regular vanilla FFT), but keep in mind that randoms contain many monsters, and 1.3 monsters are a lot more capable, so this might present a little extra challenge.

Additionally, they are now vulnerable to minor negative statuses such as Don't Move, Don't Act, Confuse, Slow, Silence, Darkness, Berserk, Poison, etc, provided they don't bring Accessories to block those statuses.

Human Bosses / Mini Bosses have lost any Defense UP / Magic Defense UP / Maintenance Innates they had.

Brave Lowering skills such as Mocking Strike, Gaze of Terror, etc may not be used by the AI.

Two of your starting generics (right before Gariland) Brave Values is set to always be at 70.

More recruitable Hydras have been added to Bervenia Volcano.

Recruitable Uribos have been added to early Araguay Woods East and West.

Intro Battle Lezales is now easier to kill.

Onion Knight and Hitoshi are now easier to Rescue.

Added to Zeklaus Desert, Bed Desert, Fovoham, and other areas.

Cactuars added to the game! No Monsters had to be replaced to bring Cactuars in.

Lich now deals Dark damage with a 20% chance to cause Death.

Dorter II enemy levels are now properly set to be static.

You can grind to Level 99 and get as much JP in whatever job so you can attempt any battle at your own pace or to experiment the new content. This means you can grind to a higher level if a particular battle is giving you too much trouble. You are free to level as high as you want, and they will not match their levels with yours. This has the same content as Final Fantasy Tactics 1.3 (the harder version of this hack), but with fixed storyline enemy levels.

Final fantasy tactics zodiac bosses