MISSION 28: I ABSOLUTELY CAN NOT Win this Mission on [u]"Very Hard"..

Sorry it took me so long to respond this time, but I was working on leveling up Aizen and his movements are really slow.

Anyways, when I beat the final mission on Very Hard I did these things and it was easy.
1. Play as Uryu Ishida. Keep using his Ginreikojaku/Seelescheider combo. When you run out of spirit pressure you can still use Heizen while the bar is yellow, making Ishida unique. If he is not one of your lvl. 175 characters than make him one. Also, never use those close-range square attacks, he is simply no good for close-range.
2. In rooms with multiple bosses, attack one at a time and do not attack any other bosses until that one is dead. This is the most important tip because the bosses are programmed to not power up or use ignition attacks until their health gets below a certain piont. In fact, for this reason you should even go out of your way to not hurt any bosses besides the one you want to kill (The narrow, long range and accuracy of Ishida's arrows make this easy, which is the whole reason you are using him.) This takes care of your endless ignition attacks problem.
3. In this game, you can actually take advantage of pausing to observe your surroundings and decide your next move, magically giving you the ability to have superhuman reflexes and split-second decision making skills. If you've ever played "Demon's Souls" you can see why I appreciate this.
4.This mission is made much easier if you kill certain bosses first. I will explain how to deal with the hardest rooms.
In the room with Kenpachi, Starrk, Nnoitra, and Kyoraku, kill them in this order:
1.Kenpachi (his spirit attacks will destroy you and your arrows otherwise, also stay high in the air using the triple jump upgrade to avoid Starrk's wolves)
2.Nnoitra (his spirit attacks are pretty annoying too, still shoot from high up)
3.Starrk (finally gets rid of wolves)
4.Kyoraku (least annoying)
In the room with Soi Fon, Yoruichi, Halibel, and Rukia:
1.Soi Fon (her two hit kill makes her by far the most dangerous one here)
2. Yoruichi (her needle throwing is going to be annoying by now)
3. Halibel (her water throwing is almost as bad)
4. Rukia (least annoying)
The room with Gin, Toshiro, Byakuya, Aizen:
1. Gin (butorenjin is really annoying, avoid Toshiro's ice prison)
2. Toshiro (don't get trapped by Sennen Hyoro or you may lose a life stock)
3. Byakuya (has multiple long range attacks, so kill him)
4. Aizen (slow and easy to avoid, but has some high damage attacks so watch out)
Final room:
1.Final Ichigo (his spirit attacks destroy arrows and he does it a lot, so you want him dead first. Watch out for Final Form Aizen's attacks because he can destroy one life stock in one hit if he sucks you in. Just stay away from Aizen, he has multiple overpowered attacks that can kill you.)
2.Final Aizen (shoot from far away because he is dangerous)
3.Kokuto (not so dangerous but you don't want any distractions when dealing with Barragan)
4.Barragan (extremely dangerous but only when you're close to him, which is why you've been able to avoid him until now. Now that you and him are alone you have all the time you need to regenerate and wait for his death field to wear off, and when it does, shoot him with a bunch of spirit attacks and even an ignition attack if you want to finally finish the mission.)
That was a pretty long read I'm sure, but now you have every peice of advice you could possibly need to win the hardest part of the game.