Maloriak overcomplications and misinformation abound apparantly?
The adds are perfectly killable if there are a couple at low hp after the phase ends - we often have stragglers that we single target down. Moving him out isn't too important until the debuff is about to fade, you want him taking that extra damage too, and the interrupters are able to contribute more that way. The MOST important key is interrupting additional adds during green. I know it was said that it's not a big deal but that's bullshit, it is, as soon as new adds drop out the new ones don't have the green debuff and immediately buff all of the other adds, making AE almost impossible. THAT is the most critical part of the green phase, the rest is totally trivial and being overthought.
Also, 'sometimes getting extra' is not a viable option. Get on your interrupter's case if they're letting more than 9 out, especially if you're using a 3 tank 'tank the adds' strat, rather than a kiting strat, there's no way you can tank that many extra for more than a few seconds.
GL with the boss