Percussion writing in dorico

Hello all,
I am currently working on an orchestral piece.

I have 3 percussionists to work with, but I have no idea which instrument will be assigned to what performer.

I am looking to consolidate multiple individual percussion parts to 3 players.

is there an easy way for me to finish writing the percussion part, and then assign the instrument to the performer?

You can do it more or less like you want to. You can always assign a instrument to a different player in setup mode. Just drag zhe instrument to a different player.
You can start with every instrument for a different player or all instrument for a single player, etc

In the end you can also create layouts with multiple players assigned to it.