I would have thought that Pandora with a couple of Sorrows would make pretty short work of him - or something similar. They'll do everything you need - play with it's activation order to limit the build up of Burning via other models, put pressure on it's controllers hand (constant wp tests), and circumvent it's armour (multiple 1 damage sources). You could possibly mix in an armoured, SS capable model (for damage prevention flips) like Barbaros to hold it's attention long enough to set up Pandora and Sorrows up for the kill. Pandora also gives you options against out-activation since you can dictate the order of activation. Lastly, if you find the archanids bunching up, send in an Insidious madness to throw down some paralysis.