Right not a bad 1st iteration but you've skipped Skewer and ruined your dmg immediately. The dmg buff from domination gives the highest +dmg buff to melees. And you say you dont wanna be in melee yet have taken Thorn Burst which is pbaoe and more aggroing than skewer could ever hope to be Oo....
Also get rid of water spout as it inhibits your offense by chucking things in the air over and over. It may also be worth taking out CJ/SJ for SS as that then frees another power slot. As this seems more concept oriented I would swap to SS which fits in skewer, and bin water spout for thorntrops. They may seem rubbish until you seen a plan/thorns throw them down as something tries to escape a creeper patch and they grind to a halt with DoT raining on them 
Oh and you can legitamise SS concept wise (he's so in touch with nature he can channel it through the ground hurtling himself great speeds or some such gubbinz).
Depending on how you play this really would depend on patron powers I would get oersonally but the mako ones are pretty good plus the pet is a psi brute so not all bad eh.
Theres also the question of IOs and even permadom but if this is ya 1st proper villain I wouldnt worry tbh - enjoy it as the dominator is possibly the most fun of all ATs and later game theres very little a dom or 2 cannot, with a simple flick of the hand, suppress and laugh at as they pick the targets bones clean.
If ya want more build ideas of dominator help feel free to holler at me anytime (on Union) @Starscreamer.
Hi,
Decided to give the bad guys another go.
I like the concept of a plant/thorn domi but I havn't played any of the sets before so I'd like some feedback on power picks.
This is what I got so far.
Villain Plan by Mids' Villain Designer 1,401
http://www.cohplanner.com/
[u]Click this DataLink to open the build![u]
Plant Dominatrix: Level ?? Mutation Dominator
Primary Power Set: Plant Control
Secondary Power Set: Thorny Assault
Power Pool: Speed
Power Pool: Leaping
Power Pool: Fitness
Ancillary Pool: Leviathan Mastery
Villain Profile:
Level 1: Strangler -- (A)
Level 1: Thorny Darts -- (A)
Level 2: Roots -- (A)
Level 4: Fling Thorns -- (A)
Level 6: Hasten -- (A)
Level 8: Seeds of Confusion -- (A)
Level 10: Impale -- (A)
Level 12: Combat Jumping -- (A)
Level 14: Super Jump -- (A)
Level 16: Swift -- (A)
Level 18: Health -- (A)
Level 20: Stamina -- (A)
Level 22: Vines -- (A)
Level 24: Aim -- (A)
Level 26: Carrion Creepers -- (A)
Level 28: Thorn Burst -- (A)
Level 30: Spirit Tree -- (A)
Level 32: Fly Trap -- (A)
Level 35: Ripper -- (A)
Level 38: Thorn Barrage -- (A)
Level 41: Water Spout -- (A)
Level 44: Shark Skin -- (A)
Level 47: Summon Coralax -- (A)
Level 49: Hibernate -- (A)
------------
Level 1: Brawl -- (A)
Level 1: Sprint -- (A)
Level 2: Rest -- (A)
Level 1: Domination
Skipped Skewer cause I'd rather not be in melee too much. Spore Burst and Thorntrops cause they look useless. Picked up the Leviathan ancil powers cause i feel they go nice with the natureish (?) theme.
Ehm, I got slotting for most powers figured out i think. Just a matter of placing the slots but I'm way too tierd for that at the moment.
Thanks
Oh yea... Quick edit: Shall I swap Spirit Tree for Acrobatics?