Huh. For Some reason I thought Stakataka's ability would reduce damage by 30. I guess they had to reduce it, because stacking it would have been a bit OP if it was -30 for each. Might still be ok in metal Naganadel but I'm not too hyped for it.
VikaRay sounds sweet, but not necessarily better than VikaBulu. It sill only has 180 HP, (190 would have been an upgrade compared to Bulu) has an ability that is not that great, meaning that stuff like Weavile has more targets against you and you don't hit anything for weakness. Also, weak to Gardevoir. The GX attack is a better Big Wheel though which is nice, especially with no Sycamore in the format.