I have been a member of WGT for over 2 year and just recently moved up to Tour Legend. Up until that point I was quite competitive in ready goes and other stroke play events. But in the current virtual tour the leader has shot 63 on best of the par 5s (that's 27 under par). On a very good day I could see myself shotting 20 under (I use Nike RZN ball and have R1 driver and R11 irons), but I always make a few mistakes that make it so I am generally between 72 - 75. Even so there is always the wind that may or may not determine if you have a chance to reach a par 5 in 2.
I can't see how you could shoot a 63 without an auto dinger. It is getting to a point where I am not interested in the game anymore.