I have prepared with purchasing the longest flex arm possible haha ! Hopefully I run into that issue. I am thinking of running the Pico Fuge Light along with white itense preset for the AI Prime. Than last hour or two ill transition to heavy blues. I won't mind seeing metallic blue leaves for just 2-3 hours of the night. Should be worth it for the corals. I imagine you can prune them pretty heavily as most plants can be bonsai.Yes definitely if you want programability and you are not ad DIYer then I agree with your choice. If there is the possibility to run the white channel with a decent intensity it sounds quite interesting what you want to do. Worst case scenario you can add an additional bulb over the mangrove for little money and run the AI with blue mainly (green leaves look awful under blue light)
A problem I had with mangroves (in freshwater!) was that they grew quite fast and at some point they were taller than my light fixture so I needed to add an additional light just for them. Not sure if you can prune them..