Updated the build somewhat... I'm currently at level 27. Rad/Rad is fun to play. Also, very survivable. Not invincible by a longshot. Too much aggro and you're gonna faceplant. But the build is tough enough to handle most solo situations and works well as a "tough dps" on team.
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Hero Plan by Mids' Hero Designer 1.962
http://www.cohplanner.com/
Level 49 Science Sentinel
Primary Power Set: Radiation Blast
Secondary Power Set: Radiation Armor
Power Pool: Speed
Power Pool: Flight
Power Pool: Teleportation
Power Pool: Fighting
Hero Profile:
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Level 1: Neutrino Bolt Acc(A), Acc(3), Dmg(3), Dmg(5), Dmg(5)
Level 1: Alpha Barrier ResDam(A), ResDam(7), ResDam(7), EndRdx(9)
Level 2: Irradiate Acc(A), Acc(9), Dmg(11), Dmg(11), Dmg(13)
Level 4: Gamma Boost EndMod(A), EndMod(13), EndMod(15)
Level 6: Proton Armor ResDam(A), ResDam(17), ResDam(17), EndRdx(19)
Level 8: Aim ToHit(A), ToHit(19), RechRdx(21)
Level 10: Fallout Shelter ResDam(A), ResDam(21), ResDam(23), RechRdx(23)
Level 12: Hasten RechRdx(A), RechRdx(25), RechRdx(25)
Level 14: Fly Flight(A)
Level 16: Electron Haze Acc(A), Acc(27), Dmg(27), Dmg(29), Dmg(29)
Level 18: Proton Therapy Heal(A), Heal(31), EndMod(31), RechRdx(31)
Level 20: Proton Stream Acc(A), Acc(33), Dmg(33), Dmg(33)
Level 22: Particle Acceleration Run(A), Run(34), Flight(34)
Level 24: Recall Friend Range(A)
Level 26: Neutron Bomb Acc(A), Acc(34), Dmg(36), Dmg(36), Dmg(36)
Level 28: Particle Shielding Heal(A), Heal(37), Heal(37)
Level 30: Boxing Empty(A)
Level 32: Tough ResDam(A), ResDam(37), EndRdx(39)
Level 35: Atomic Blast Acc(A), Acc(39), Dmg(39), Dmg(40)
Level 38: Ground Zero Acc(A), Acc(40), Dmg(40), Dmg(42)
Level 41: Weave DefBuff(A), DefBuff(42), EndRdx(42)
Level 44: Meltdown ResDam(A), ResDam(45), ResDam(45), EndRdx(45)
Level 47: Teleport Foe Acc(A)
Level 49: Long Range Teleport RechRdx(A)
Level 1: Brawl Empty(A)
Level 1: Prestige Power Dash Empty(A)
Level 1: Prestige Power Slide Empty(A)
Level 1: Prestige Power Quick Empty(A)
Level 1: Prestige Power Rush Empty(A)
Level 1: Prestige Power Surge Empty(A)
Level 1: Sprint Empty(A)
Level 2: Rest Empty(A)
Level 4: Ninja Run
Level 2: Swift Empty(A)
Level 2: Health Empty(A)
Level 2: Hurdle Empty(A)
Level 2: Stamina Empty(A)
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