Yes, but you often don't have the time to set PF up. It takes at the very least three "turns" on Shingen, and two on Arthur. If you go against Raiko who is already two turns ahead of you, thinking that you have that much time, you'll just end up full bursting second. And then your impressive damage output will be entirely wasted since the boss will already be dead before your burst bonus kicks in.
This is what I mean by estimating how strong the raid is. If you see somebody use Cheer+, then you're in a RUSH and will NOT have the time to set PF up.