FWIW here are some positions Rexler could go.
Curiously, "Boost Right (via Advanced Sensors or Coordinate) + 4K" looks quite blockable. Then again, worst case scenario, only one other TIE max. will be able to shoot him if others tried to block his more predictable moves, and then he does a 4K next turn to be in an amazing position. It's probably worth it even if the TIE player fully expects and plans for it, and definitely worthwhile if those TIEs aim for any other possible position.