This makes me kinda sad, these fights are already ludicrously easy as they are. :C

But if any nerfs do occur, It'd most likely be some of these:

T10 * Vulnerable Target damage reduced * Son & Daughters overall damage reduced * Son & Daughters won't be proximity buffed * Electric Puddle damage reduced

T11 * Nodes can now be damaged equally by casters and melee * If tethered partner dies, the other player won't die * Initial Nerve Cloud after adds no longer Crits. * Secondary Head damage reduced on Main Tank * Resonance Damage reduced on single target

T12 * Brand of Purgatory damage reduced on originator * Bennu Crit. Rate decreased / Damage Reduced greatly * Bennus will no longer buff on revival proximity OR... * Phoenix will not gain additional Stack upon Bennu Prox. Buff * Phoenix will not gain additional Stacks upon felled player * Revelation Vuln. Damage Reduced

These sound like the most realistic to me, since before this, most fights have been nerfed to the point where all of BCoB and SCoB are now solo-tankable without special attributes and it's tanks that stand to make the most mistakes in fight that can actually make the fight take a nosedive.

As far as T10 goes, I doubt they're gonna nerf the main battle mechanics, but they can nerf the damage someone takes from being in Vulnerable status. For T11, the only thing they can really do realistically, is to get rid of the tether mechanic from which you die if your partner dies, as this seems to be the biggest reason most T11 groups take a nosedive in final phase. For T12, it's still really tough to make this solo-tankable, but you can get rid of the Tank swap mechanic making the fight drastically easier (Revelation Debuff) for tanks (DF tanks doe).

Pretty much they're gonna want to try to get rid of mechanics that require higher active participation and awareness within regular DF groups.