Well, on a Rad/Mental there isn't actually much that i24 would change for me. Proton Volley becomes a strong attack with 24% To Hit. The only way you'll get there solo is with Aim or Concentration. Depending on your recharge rate, that's probably often enough to take it. I wouldn't say it's something absolutely necessary for you though.
As far as what to build for, it depends on how you want to play. It is possible to create an effective at range build for the character. In that case you should go for ranged softcap and a comfortable amount of recharge in your set bonuses. If you take Force Mastery you can use Repulsion Bomb to safely enter melee range and use DP while your foes stand back up.
One note though, when i24 hits your set combination will be a PBAoE monster. The nuke change will mean you can enter melee and fire off Drain Psyche -> Irradiate/Neutron Bomb -> Psychic Shockwave -> Atomic Blast. If my understanding is correct, you'll be able to do that every spawn. I would suggest Mace Mastery in that case. Using Scorpion Shield (which you'll be able to recolor to taste) you can softcap S/L/E and deal your insane AoE damage in relative safety. Any attacks that do hit you will regenerate quickly with a well slotted and saturated Drain Psyche.
@Rorn ---- Blue Baron ---- Guardian
I am planning on redoing my Rad/Mental blaster. I don't HAVE a build per se since i am still working on the toon. I would like to get some ideas and information on what would be good power choices with the new i24 changes on the way. If someone has a base build or suggestions in what I should look for in this toon that would be Extremely helpful. I was trying to go the At Range Route...but alas it seems i spend most of my time pbaoe with some time spent getting 'into the center of mob. I have read several post that seem to be on the way to being 'outdated'. I would also like to know with the new changes does proton volley become something that is EXTREMELY valuable in the team atmosphere, or should i take it. I have a concept that takes stealth, and teleport, hasten, and hover in my build. I use the stealth for def mostly. If there are suggestions as to dropping something i am completely open to consideration. Thanks for all your help in advance.