Warriors Orochi - Unlocking Keiji Maeda

[Warriors Orochi] - Chaos Mode
Wu Chapter 6X - Battle of Osaka Bay
Unlocking Keiji Maeda
Requirement :
- Make sure all ally reinforcements are alive and reach Keiji's base before time limit shows 10 minutes remaining.
Basically, Keiji Maeda is one of the toughest character to unlock.
Here's a few hint :
1) Equip both the Cavalier and Impulse abilities. You'll need them as you end up running around a bit and then you have to cut your way to the garrison Keiji is in. I'm not using Cavalier as I am focusing more on Speed and Power abilities for Lu Bu and Mitsunari Ishida.
2) Stay close to the base, ranging only as far as you need to save allies in danger until you summon the last ally, which is Hanzo Hattori.
3) Once Hanzo has been summoned, you need to cut a path through the enemy officers to the enemy base. Start with the lower path (has Ina, Ieyasu Tokugawa, and Lu Meng in it) as more allies are there, and more enemy officers should be there, especially if you've been cleaning out the paths to your base in-between summoning allies. Then hit the path with Zhou Tai and Hanzo on it.
3) When Keiji has made the statement, "Whoo, now you're really on fire! Okay, I hope you're ready...", that is the indication that you have successfully meet the requirements.