Peer list question

So i notice my peer list varies a lot overtime. now its at 5 or can be 3. i assume i would be at 15 peers all the time. i did try adding this to server config(see below) or its this fine. im just worried does this affect my reward probability to find a block?

It does affect your probability a little bit, but not necessarily to a non-negligible degree. As long as one of your peers is well-connected you are fine, I think.

Good to know.
Thank you.

Ok new question along the same lines. what if i am connecting with peers running older nodes like example 0.5.2?
Should i update my config to block them?