Here's the thing....I am not one to tell ANYONE how they should play a set, but what initially drew me to making a dominator was how underutilized it was by players imo. When I see builds very few people think outside the box. They pick doms/trollers they think holds and crowd control which is what they are designed for. The beauty of this game has always been making something DO something its not supposed to.
I slot for defense not holds which is a sin to some, I slot for resistance, I use holds and confuse to avoid streak breaker not to stop enemies. Its not for everyone but if I listened to the forum majority I would never have discovered its greatness.
I see doms (depending on the set and skill level of the player) as potentially a cross between brutes and blasters if you get out of the hold em and blast mindset. Many here will tell you "just make a brute if you want to do x" or "make a blaster if you want to do y" why do that when you can do both with a dom? I farm faster than all but 1% of elite farmers so why do I need to make a brute to farm? If you get out of the mindset that x set does x thing you can find some gold and truly unique gameplay that can't be matched.
I farm with a plant/fire dom.....I farm FASTER with a plant/rad, I have made a dark/energy dom and even farmed with that (albeit slower). Yes you need some skill to do this moreso than just making a brute, but the idea that something "shouldn't or can't" be done cause its not designed that way is crazy pants to me. If you can do it then why not do it? You have to change how you build and look at AT's to do unique things.