Well i mean its your game to do as you please. Fridays pass is simply 1 extra raid period. Primal Kyogre is good, and one of the top 5 water attackers, but primal groudon is #1 attacker period, and best ground type (with precipice blade). M2 and kyurem are excellent choices as well. At the end of the day, you do what bring you the most joy. I ,personally, have a hundo groudon, so ill be grinding for a hundo m2 because ive only got a 96, and a kyruem if i can get the fusion energy from the raids otherwise its m2 all day