I have been on at least 2 itf's where healing nictus was left alive with it's god regen and it's massive auto hit heal. Breaking line of sight can be hard anyway since rom likes to run dragging the healer with him.
Having done the ITF a couple of times I've seen both methods work. 1st all guns blazing, defeating Romulus 4 times without seperating him from the nictus (damage heavy team) 2nd by seperating him from the nictus, still killing him 4 times, but without him having the added heals from the nictus. I haven't tried picking the nictus off one by one yet, but wouldn't mind giving it a try when my blaster is closer to 50, I imagine it's a bit like a mini hami raid if you're not a range AT, as you have to sit on the hill cracking jokes 
I've been on one attempt at the ITF where team make up wasn't good and we failed. The reason for this, I think was because the tank that we had on the team was tbqh useless, For someone that's a 3yr player, and claims to have successfully done the ITF several times he didn't have a clue about the ITF at all, let alone what to do to in the fight against Rommy. We weren't particularly damage heavy, so with a little (helpful) suggestion from the team when we tried to get the tank to seperate the nictus from Romulus. After dragging the AV's all over the team, the tanks response was that it was impossible to seperate Romulus from the Nictus(I know otherwise). we had a brute taunting Romulus, but I think that the tank was taunting Romulus as well, thus breaking the brutes taunt, and preventing us splitting the group. needless to say, that tank won't be joining me on any TF again, and a re-run of the TF a day or 2 later the proposed tactic which was snubbed worked a dream...
Thus, make sure that whoever is tanking Romulus has atleast a bit of a clue about how to take care of the AV. they don't need to have done the TF before, but listen to suggestions from the team, and if all else fails, point them towards the forums and perhaps to this thread.
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You cannot dream yourself into a character: you must hammer and forge yourself into one. �Henry D. Thoreau
did it woop woop! when you cant get through a task force who ya gunna call?! DUSTY! he got me a task force set up, we blazed through it came to rom and two heros puled the nictus heal and the rest of us laid into rom took him 4 times to die and then we had it. once you get a good team its really not hard to do. thank you guys for your help and support and thank you DUSTY! woo
I've found moving Rom out of the range of the healing Nictus (about 30 feet) and killing him works quite well and is pretty simple to do. If you have two tanks/brutes then one keeps Rom busy and the other taunts the Nictus. Alternatively, immobilise Rom and have the tank move the Nictus out of heal range while keeping everything taunted.
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