Something wrong with using Knights-Even with all the equip that they can use to raise MA (2 rune swords, wizard robe, magic gauntlet), their MA still fall short of the magician classes. Therefore your magic will be quite ineffective against enemies, and for healing. At most it will heal about 250. 400 at tops. The enemies can easily do up to that damage. By the way, I noticed that you sacrificed a lot of evasion, meaning that you will be hit all the time.

Knights are not the best class. Wizards are. Of course, their abilities alone are useless. You will need to use abilities from other jobs, but it definitely makes a better party than knights, even with normal equipments.
This party is as close to invincible as you can get.

2 female wizards:
97 Brave, 84 Faith

Math Skill
MP Switch
Maintainance
Move-MP Up

3 female wizards:
97 Brave, 3 Faith

Draw Out
MP Switch
Maintainance
Move-MP Up

Wizard Rod
N/A
Ribbon
Chameleon Robe
Chantage

You see, each time they get hit, they take MP damage. As long as they have 1 MP left, HP will not be decreased, no matter how much damage is done. It doesn't work the other way, so there is no worry about taking HP damage from MP draining skills.
If one happens to die, Chantage will raise her right back into battle. It is impossible to break or steal. They will not be affected by any abnormal status effects, except Innocent and Oil, which can be removed by calculating Esuna. It'll be almost impossible to impose a status effect, without using Draw Outs, on the Wizards with little faith.
Though they do not start with it, you can quickly haste this party using a Draw Out or Math Skills.
Finally, we are down to attacking.
Against high faith enemies: duh. Calculate any ol' spell that they can't absorb. Probably flare, since nothing can absorb non-elemental spells. Since the wizards have MP switch, you don't have to worry about dying from your own spell. Flare should do about 600.
Against low faith enemies: Draw Out. Draw Out damage is based on MA, not PA. Thus, wizards will do the most damage with it. You can quickly decimate the enemy rank around you, or far away with the Kikuijimoji. It neglects faith, so it's impossible to dodge, and its damage can only be decreased with Zodiac signs. Chirajiraden will do about 600 damage, and Kikuijimoji about 500, at level 99.

Lets try pitting this party against yours, Jay.
You say your knight can do 1000+ damage with math. We'll go with that.
1000+ damage-MP of the wizards leaves about... 700. That's 700 HP damage to the wizards with Math. That should be enough to kill them. About 1 second after your knights go, though, they'll be right back up. Now we come to the wizards with Draw Out. they'll take no more than 100 damage due to Faith. Now, 3 wizards with Draw Out will do... around 1800+ damage with Chirajiraden. Assume they can't get that near, they'll do 1500+ with Kikuijimoji. That should kill 1 knight and heavily hurt another if they can't catch the knights in rows. In reality, probably kill 2 or 3.
Now we get to the wizards with Math. Just tell them to walk, and MP goes back up. When wizard 1 calculates, and you say all your people are L99, they will all be hit by Flare. Of course, so will the wizards, but they have MP switch, so it does nothing but MP damage. That should take off 500+ from everybody. After that, the other wizard walks and calculates, destroying all the knights.

You probably should have realized by now that the ultimate party isn't with Knights. In fact, they are easily killed.