How high is the difficulty?
Could be its just too much to take on at the moment. In general you will want to use seeds to get the enemies off you then use that thorn cone thing. You can also use the AoE immobalise to keep them grouped up (a side effect of seeds is that it tends to bunch the enemies together). Bunched up is good for that thorny cone. I'd take at least one melee attack. I cant remember which one I have but it tends to hit harder so its useful for finishing off enemies.
Creepers can make a decent ghetto tank or a speed bump when you have to run away. I'd slot 3 recharges in creepers and maybe 3 recharges and 3 accuracy in seeds.
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Fiend Space: 211464
Yeah, to be honest, Thorn Domis really start to shine when you get some melee strikes into the mix. The damage factor is better for melee attacks than for ranged ones. And when you have Aim and Domination up, you're doing some serious spike damage with near-guaranteed hit prob.
Thorns and Fire are the secondaries that are aching for high-powered attacks, Ice and Energy are the ones for maximized control abilities like your build aims to be. You might benefit from a paradigm shift from a controller with some blasts to a blaster/scrapper with added control.
Your actual mileage might vary. This is just a suggestion.
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...only a couple of attacks from sec(as most are melee,and i play ranged...
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That's probably your problem right there, depending exactly on which couple you have. Thorns big stuff IS in it's melee attacks. You should have Skewer for sure, and you're close to getting Ripper. Thorn Barrage comes at 38. It's classed as ranged but that range is extremely extremely poor so may as well just about consider it melee LOL.
Slot you Flytrap asap (I'm guessing you did take it at 32?) and this will start to make a huge difference. It spits a lot of it's own immobs and also spits some nice attacks with it's own Fling Thorns and kind of Impale power. It will also get into melee sometimes for some good chomping action 
. It's attacks compliment and add to your damage output nicely.
A good chain is Seeds Of Confusion, Immobs, Fling Thorns then dive in a get stabbing. Your Flytrap should follow up with a nice additional barrage of Fling Thorns and add some good single target attacks. If you want to be sure to avoid any possible slip ups, use Carrion Creepers as your opening move. Mobs will turn their attention straight on these, and you'll have some time time to line up what ever it is you want to throw in next.
What difficulty are you trying? In all honesty, after achieving the 'Flytrap you should be ready to up your difficulty not having to down it 
.
Plant/Thorns is a PvE monster. It plays very viciously as a kind of spiteful Blapper with great controls. I don't overly agree that it's control is outshined that much at all by other Dominator sets TBH. Plant has a devestating amount at it's disposal.
Maybe you might want to post up your build for some further help in getting more out of it?
What server are you on. Could always Lackey to mine for a couple of quick newspaper mishes if you're on Defiant and want some ideas, or try stuff out.
ah.that may be where im going wrong,ill try melee for a bit.i usually do the confuse/immob/cone attack combo.ill try it diff.should i slot the 2 1st and 2nd ranged attacks from plant,and how?the 1st i use for a good hold,the other for dam,any thoughts?
The 1st and 2nd ranged attacks from Plant (the control) or Thorns (the attacks)?
Sorry, just need to ask and clear that up, as you say you're using the first to "hold" so I think you're talking about the Plant side maybe.
Slotting on your attacks pretty much depends on how much you're coing to work with Invention Sets. See, you *could* slot it heavily, looking for a good bonus on recharge or something. But that's a lot of debate and personal opnion that differs from one person to another and won't fit in here at all .
Basically for simple stuff at least just stick an Accuracy in the one Thorny Dart slot. It's pants damage but is a very very quick attack and excellent for adding to the Domination bar. RAWR!
Your other attacks your really want to aim for 2 Accuracy 3 Damage at the very least. But especially slot Skewer as a priority if you're going it alone a lot. Then if you have Impale maybe slot that, then go for Fling Thorns after that. If you're soloing, your mob sizes are small and it's better to chew and spit out enemies one on one real quick than nibble limply at them several at a time .
If you're teaming a lot and always in teams with nice big mobs to feed on, then sure, get Fling Thorns slotted up heavily and enjoy that awesome cone chain 
.
As long as you think stabby stabby rippy and go in for that, slotting them, then you should get on much better.
Of course don't go trying to be all stabby stabby rippy on anything that isn't totally confused and beating up it's mates, or otherwise doing naff all, squirming and held .
cool.ty mighty(and u others too).im going for stabby stabby rippy now.
ok.just thought id recap.ive taken onboard what u guys have said.im trying as a melee attacker.ive slotted skewer,impale,and throw thorns with 1 acc 3 dam each.i tried doing a mish.got killed by a mob of yellows.but after the mish,i killed a +4 purple single luit on his own,no prob.seems im more suited now to killing single ppl at a time.ive got combat jumping,and stealth,both with about 40% def in each,but still dying a lot.and,with it being too damn hard to find teams on cov,means im going to have to solo at low diff it seems.ty for yr help guys.
Combat jumping and Stealth don't really give good +defense. The actual values are something around 2.125% on a dominator, which means that with the +40% buff, you're getting around 3% of +defense from each, totalling +6%, which really doesn't help enough to count.
As a dominator, the best way to get damage dealt to you reduced is to use mezes. Use Mezes on foes you are not fighting - if you're fighting 3 foes, keep one Held and you have only 2 people to fight. Keep mezzing those enemies you are not yet fighting, if you have 1 mob mezzed and have killed one, you have only one guy to kill.
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doms seem under-powered to me(may be mistaken!!).i have a plant/thorns dom at 33,and cant do a mish at high diff.does anyone pls have a good build for pve for it,or any advice?i have taken most of the primary(except tree and sleep),and only a couple of attacks from sec(as most are melee,and i play ranged).pls,any help?
