At guild level 55 (only 2.5 levels to go) we get 3 extra small ship slots. Those can be used to add an int shrine and maybe even a dex shrine plus an electric shrine and a cold shrine (if we don't pick the dex shrine). So the best way to get the int shrine is to get us to guild level 55.

We have all the astral diamonds for the upgrade so we just need to play to get there.