I split this off into a separate thread so we can discuss spider tanking here.
Bear in mind that spider tanking is one of those things that looks great on paper, however, it can be very difficult to execute properly in the middle of a battle. For starters, spider tanking requires that members lock other members of their own fleet in order to use the remote rep module. While this is simple enough in theory, in practice this can easily lead to incidents of fratricide as members get confused about which locked targets are friendly and which ones are the enemy. Good communication and experience will help mitigate this issue, but even an experienced fleet can make mistakes if the battle grows hectic and people simple go into information overload.
Another issue with spider tanking that it works best if the fleet is comprised of very similar ships. Since remote reps don't have a long range, the technique only works if the ships remain close together. Obviously, this can be a problem at some gates or if the fleet becomes scattered due to confusion or differences in ship speed due to different fits or skill levels. Also, if the fleet is employing remote armor repair modules, then a ship fitted with a shield tank is a problem. This all needs to be worked out prior to the battle.
Another threat is electronic warfare. Spider tanking requires locking friendlies in order to rep them, so if the fleet gets jammed it will break the locks and no one will be able to get rep. It that happens the tank will break and the fleet will probably die.