Tiffany was a key addition for the Aces last year, and I expect both the team and the player would like to do it again, but the cap may get in the way. The Aces will probably be looking at 11 players not 12, and quite a few that are at or near the minimum. To the extent they do spend more than that on a key rotation player, the money might be better spent on a big.
One advantage true contenders have, however, is that they can sometimes get a player for less than they could get elsewhere because the player is chasing a ring. It happens in reverse as well, where weak teams in unattractive cities, or with poor facilities, that have lots of cap space frequently have to pay more than market value to get a player to go there.