thus far, I have not seen anyone replace Keepa. Here's the team I use.

FW-L:Vilucha/Keepa
FW-R:Nedus
MF: Tidus
DF-L:Kiyuri
DF-R:Zev Ronso
GK:Wedge

I don't even look at Nimrook because he's taken and is never a free agent. Wedge is my goalie because he has the 2nd highest ca when maxed. No one seems to realize that Keepa has THE highest SH in all of the blitzball players. His shot reaches 99. Nedus also has a decent shot. Same with Vilucha. As for the decent, they have a decent attack, which is needed if they are going to break through.