It sounds like this is a position that T&T have a nice problem with, for what it’s worth, here’s my thoughts on the matter.
Shaka is immense, both as a player and as a man. Since he left Pompey I have not been that confident with any of the Keepers we have bought in, I would rather have him in the squad than Sander Westerveld which I think says it all about the man. If you have a better number one than him, you have a better keeper than over half the other teams in the world cup.
Warner looks good and has played well as cover and fully justifies Fulham signing him on a permanent deal. The signing of Niemi will make him 2nd choice keeper at best, but being kept out of the team by Niemi is no insult, he is a class keeper, now he is back in the premiership, he is probably one of the top 5 keepers in England (Remembering that two of those five play for Chelsea).
Ince is not playing for Coventry at the moment, so it doesn’t look too good for him. Remember there is a massive gap between the premiership and the Championship, if Ince can’t get into a struggling Coventry side, then I would question if he is the man for the job.
Jack sounds like a good keeper, I know Dundee were pretty pissed that he didn’t return from your game against Bahrain in time, but again the SPL is not that great a league, however, he does seem to have more first team football under his belt than Ince
So for me, it sounds like Ince will be the one to miss out.