Burnt shortcake - frag? iodine? move? what to do?

[Duckhams]

Hi guys,
I have a microclados (possible strawberry shortcake) in my system. It's pink/purple since I got it and has never coloured up. I fragged a piece and put it in the highest lighting/PAR spot I could find and sure enough it's starting to develop a green base. The problem is, the mother colony is getting burnt tips and not colouring up. Im still determining the cause of the burnt tips, it wasnt an alk swing, could have been an increase in my radion intensity, but here's my question:

Should I frag the whole colony and move them higher in the tank?
Just snip off the burnt tips and leave it?
Snip the burnt tips and move it into higher light like the frag?
Add iodine to help the burt tips heal?

What do you guys recommend?