Here is Keiji Maeda's level 100 survival mode run without any rage mode or rage musou.
I managed to create him a perfect custom rare weapon, now that I know how. I got a weapon that came with three skills, like usual. When you get weapons with three skills, all three skills need to have a minimum value of 15 in order to end up maxing out. Something else to note, is that Keiji is one of the very few characters who has a weapon base attack of 99.
To get through this run I mainly use his charge 5 attack. The charge 5 attack is a multi-hit move and can really destroy officers. I also like using his charge 4 too, usually when it gets crowded. The charge 4 is another multi-hit move that has better coverage and range than charge 5, but is weaker. I mainly prefer his charge 5.
Weapon Skills: death, fire, ice, attack, defense, speed, attack speed, indirect
Since Keiji has multi-hit moves, I'm using ice instead of earth. Keiji works well with earth too, but I prefer using ice when the character has multi-hit moves.
Epiphany Skills: Kanetsugu Naoe, Muneshige Tachibana, essence, Kanbei Kuroda, Hanbei Takenaka, Munenori Yagyu, Kagekatsu Uesugi, wisdom
To see other characters' level 100 survival runs completed without rage mode and using custom rare weapons, check this playlist.
https://www.youtube.com/playlist?list=PLGOggyrQMqTg-YaLaG2bkCWj_hyAD2SSZ