Forum:Wiraqocha Tag-Duel Query

Despite my best efforts I cannot find a satisfactory answer to this Tag-Duel scenario involving Earthbound Immortal Wiraqocha Rasca. While I already know you cannot shuffle in more cards into your deck than your opponent has cards in their hand to discard (max. 3 under normal circumstances). But what about if there are multiple opponents? Do they both discard, with WR gaining a requisite amount of attack points? If three of my cards are shuffled in, do I pick which opponent, and if I can do both, could WR potentially reach up to 6100 ATK? Sadly, there are not many reliable rulings about the complicated nature of 3+ way duels, so I would appreciate some clarity.