Created a Grav/Rad

Hi i created a Grav/Rad troller last week and managed to get him up to level 14 yesterday. I was wondering if people could give me a little build advice and possibly a little slotting advice(what to slot what not to etc). I've used the hero planner to give an example on how i plan for my build to play out but left the slotting empty as i'm at work and can't remember how i've slotted so far. I aim eventually to do a mix of PVE and PvP.

Any help is greatly appreciated.

Exported from version 1.5C of CoH Planner
http://joechott.com/coh

Archetype: Controller
Primary Powers - Ranged : Gravity Control
Secondary Powers - Support : Radiation Emission

01 : Radiant Aura Empty(01)
01 : Lift Empty(01)
02 : Gravity Distortion Empty(02)
04 : Accelerate Metabolism Empty(04)
06 : Propel Empty(06)
08 : Hover Empty(08)
10 : Recall Friend Empty(10)
12 : Crushing Field Empty(12)
14 : Teleport Empty(14)
16 : Hurdle Empty(16)
18 : Radiation Infection Empty(18)
20 : Gravity Distortion Field Empty(20)
22 : Enervating Field Empty(22)
24 : Lingering Radiation Empty(24)
26 : Wormhole Empty(26)
28 : Mutation Empty(28)
30 : Health Empty(30)
32 : Singularity Empty(32)
35 : Stamina Empty(35)
38 : EMP Pulse Empty(38)
41 : Mental Blast Empty(41)
44 : Indomitable Will Empty(44)
47 : Mind over Body Empty(47)
49 : Psionic Tornado Empty(49)

-------------------------------------------

01 : Brawl enhancement(01)
01 : Sprint enhancement(01)
02 : Rest enhancement(02)

Id take Crush over Crushing field
Stamina is a bit far out there at 35 and running those Rad debuffs will cut into your end big time of you dont have it. If you were a defender then not having Stamina at all wouldnt be that bad, but as a controller, you will need it, more or less.
Might want to try slipping Choking Cloud in their, it will help with the AoE control Gravity lacks

On the Gravity side of things, all looks fine. For slotting advice take a look at this excellent guide

thankyou for the replies and for the link to that guide, it was very useful I've updated the build so that i have stamina by lvl 24:

Exported from version 1.5C of CoH Planner
http://joechott.com/coh

Archetype: Controller
Primary Powers - Ranged : Gravity Control
Secondary Powers - Support : Radiation Emission

01 : Radiant Aura Empty(01)
01 : Lift
02 : Gravity Distortion
04 : Accelerate Metabolism
06 : Propel
08 : Hover
10 : Recall Friend
12 : Crushing Field
14 : Teleport
16 : Hurdle
18 : Radiation Infection
20 : Gravity Distortion Field
22 : Health Empty(22)
24 : Stamina Empty(24)
26 : Wormhole
28 : Enervating Field Empty(28)
30 : Lingering Radiation Empty(30)
32 : Singularity
35 : Mutation Empty(35)
38 : EMP Pulse Empty(38)
41 : Mental Blast Empty(41)
44 : Indomitable Will Empty(44)
47 : Mind over Body Empty(47)
49 : Psionic Tornado Empty(49)

-------------------------------------------

01 : Brawl enhancement(01)
01 : Sprint enhancement(01)
02 : Rest enhancement(02)

A very minor point, but if you do go for psi epic (which in my opinion is the best if you want a defensive or PvP build), you should take Indomitable Will at 41 for the status protection, MoB at 44 for the psi-resistant shield and then Psi Tornado if you feel you need an attack (so Mental Blast last if you really really want another attack). This will help you with all the AVs (and mobs with psi damage) that you will be facing in your 40s.