Question about Valency

I currently have my core node’s valency set to 2 and my relay also set to 2.
Is there any advantage to have more connections open to a relay - and if so, what is the limit?
Will the core node run better if I increase valency to 4 or 10 for example? I can experiment with it but I thought I’d ask here first before messing around with it.
Basically is the higher the number better or doesn’t it matter?