Ok I'm trying to pick between DMG pools. I read https://bitcointalk.org/index.php?topic=39497.0
but it just made my head swim.
Could someone tell me from a miners perspective if higher or lower is better for these variables?
f - Fixed fee. - I'm guessing lower the better?
c - Average variable fee. -Same with this one?
o - Cross-round leakage. - Haven't a clue.
Also does ping to a pools address play a factor in anything?
The most important factor is (1-f)*(1-c) which is the average payout rate. But that's a non-issue since AFAIK most or all currently existing DGM pools are free so they will have (1-f)(1-c)=1.
If the above is fixed, you'll want c to be as high as possible. o depends on your preferences and on the value of c. For fixed c, lower o means payments arrive faster but are more variable.
High ping can increase your invalid shares rate.