*coughs* I'm going to be totally honest and say I didn't even notice that Mental Manipulation had been ported to Blasters - so no, not off the table, ignorance on my part. I did not look at blasters because a) I didn't think there would be powers to fit and I don't personally see the character as being all about the damage, more about control/debuffs - a somewhat sneaky thing that is untrustworthy.
I had not considered the siren powers but this fits well with my internal concept - I do like the idea of a Symphony/Mind control character but that seems realistic only as a dominator - which I have minimal experience of so it would be a cool thing to try.
This was kind of a core part of my thinking. Sharks - an affinity to Mako - the power of the ocean rather than Leviathan.
I had also considered "Force of Will" pool as the primary component of her mental side - which is doable but then leaves gaps in other sets making it difficult to get other powers in.
I'm seriously impressed by your input guys, many thanks. I am going to enjoy experimenting