Hi Bushwacker - many thanks for the response.
OK - goniporia are very difficult coral to keep alive - so, I wish you all the best of luck with yours. They prefer low to medium flow, with medium lighting. You should not have it in a direct current in your tank..... I would suggest in between the 2 coral bommies, right next to the rock (on either the left of right - depending on where you find it best)....
Regarding the galaxea coral - these corals should BEST be placed outside of a 20cm radius from any other coral, as they are known to have stinger tentacles that could extend up to 20cm long.... these are also known to kill off any corals in their reach. These corals are best placed in medium to high lighting, with medium flow.....