Lighting question

[VB68]

I am currently running 2-175wMH(10000) and 4- 420 actinic T5's on a 100g tank(18"deep,lights 12"off of water surface). Thinking about changing the T5's out for ATI bulbs. Looking at the Blue Plus,Purple Plus and Coral Plus. I'm wanting to get more coral out of the corals. Right now it seems the MH's are drowning out the T5's. What would be a good combination of these bulbs? Also, should I changed out 2 of the T5's and the other 2 latter,to allow for everything to adjust to the new light? Any other suggestions?

 

[VB68]

Bump.....

 

[OurReef]

I run one actinic, 2 actinic plus, and one lagoon blue for t5s. Equals out to what I consider 14. All I can suggest is maybe change out one at a time until you like what you see.