I use 5 of them and they are different for every site.
I think it is a bad idea to just have one.
Although if you want to play me where I have robert2504 as the screen name, I must warn you. I play the .01/.02 microlimit with this one.
. I do play $2/$4 on other sites but under another screen name. I use the microlimits to vent after bad beats. So I start tossing a lot of pennies
.
That helps me.
So no, it will not help you because I will be playing very different and even if you beat me, you will not be getting rich.