I just first want to say, please post your comments if you wish!
If what i'm saying here is tripe, I would like to know ;)
Not a dictatorship, just a flustered guildie lol

I apologise in advance for the rather poor sketch, but i had to draw my own to explain this.
We had some differences of opinion on how to do the first stage of Malygos last night, and while I agree that everyone should give suggestions a chance, on occasions, logic can remove the need to attempt a bad idea.
If Malygos is on the edge of the disk, and as far away from the on-coming spark as possible (See 'Good' spark on left diagram) then we can kill the spark in the centre, with all the DPS, and not only prevent him from getting the spark, but also gain the DPS buff.
If we were to remain in that one spot though, as some suggested last night, then the 'Bad' spark (seen top left of the left diagram) would need to be Death Gripped away at great range.
And what if we don't have a Death Knight
And what if it's the spark on the top right?
Therefore, any possition around the outside is not a good location for him, because there is always the potential a spark will form behind him.
Ok, so giving the idea of tanking him in one place a chance..
We're left with one option. Tank him in the middle.
But from the right diagram, you can see that all the sparks end up scattered all round the disc. There's no location around him that is best to stack the sparks, because again we have the problem of him being inbetween a spark and us, and we cant put it in the centre when he's there because of-course he'll absorb it.
So we cant get our maximum damage buff up as a result.
This could possibly be an option for an extremely high DPS group, but I don't believe we're there yet :)
The only viable and workable solution is by moving him to the edge furthest away from an on-coming spark, and killing the spark in the centre of the room so that the ranged DPS can get maximum damage! ^_^
This requires him to be moved around the outside at all times.
When you think about it, this is kind of a mix between Unub'Rekhan and Grand Widdow Faerlina. I honestly reckon thats what they're doing here, Naxx is teaching us how to do the bigger fights ^_^