A trigger team doesn't always need 4 same aura types just to keep a cycle going like 1 triggers 2 to attack, 2 triggers 3 to attack, 3 triggers 4 to attack then 4 triggers 1 to attack again just to create a cycle. 3 units around Samurai Shizu can already do alot of chain triggers since each command unit around her just needs to have their auras pointing at each other.
To elaborate it more, imagine this,
Shizu - Command 1
Command 2 - Command 3
Everyone's aura points at each other nearby.
> Command 1 attacks. At the instance of attack, this unit can have 1 or 2 triggers. 1 is to trigger self to attack again because of Shizu's aura, another is to trigger others to attack as the said unit has command aura or even trigger both. Let's say Command 1 only triggered his own aura and made Shizu + Command 3 attack.
> Command 3 attacks. At the instance of attack, the unit can trigger Command 1 and Command 2 to attack. Let's say Command 3 managed to make Command 1 and Command 2 to attack.
> Command 1 and 2 attacks. Both of them has a chance to trigger 1 or 2 triggers in that instance. They can either trigger self to attack again or command others to attack or both.
So what is the problem in that kind of setup? None.
Is it more potent? Yes, because Shizu's aura can literally make the units on her aura keep attacking again and again whether it's from her own aura proc or from command 3's proc.
Sounds good on paper until you try to set up a team like that. Just to remind you guys, trigger-based lineups have the aura of "If I attack, there's a x% chance to trigger others in aura to attack". Ideally, a shizu samurai trigger lineup would look like either set-ups.
Case A:
[Warlord ] [Archer A]
[Samurai] [Archer B]
[Archer C]
Case B(less effective):
[Warlord ] [Archer A]
[Samurai] [Archer B]
[Magebane]
During samurai's turn to attack, she does not trigger anyone else in her aura to attack. Let this be clear.
During warlord's turn to attack, he might trigger: 1. Samurai to attack, which ends here -> no more triggers
2. Archer A to attack, which might trigger: 2a. Warlord to attack, repeating the process
2b. Archer B to attack, which might trigger: 2b1: A to attack, which might trigger 2
2b2: C to attack, which might trigger 2b
However, if a proper trigger-based lineup (as shown below) is used,
[Warlord ] [Archer A]
[Magebane] [Archer B]
[Archer C]
Infinite triggering is possible. Anyone can trigger everyone (even himself eventually), but this ideal loop is cut when samurai is introduced. What she does is give 30% chance to anyone who attacks to attack again, thereby potentially triggering the triggerfest shown above. However, the chain loop dies if only samurai is triggered to attack again. Chance of infinite triggering is significantly lower.
Edit: Urgh... space constraint and formatting messed up what would have turned out to be something a programmer would understand.