There's no absloute rules for staking. You'll have to determine how much pressure is on the 'chid itself. Certainly multi blooms could use support, many of them have long stems and you don't want them blowing in the wind - break, break, break. I have phals do this with out staking, you learn as you go
I'm glad you repotted your phal, it does look over potted in that sphag. Good move on your part
It's always nice when it all comes together, then you just get more orchids
Good growing!