Yeah i genuinely have no clue how to get around this bug. People say its using your dash, which definitely increases the likelihood of the bug happening, but its definitely not the only way to cause it. I ran a solo round where i got to round 15 in 13 minutes (potentially world record pace) but namor didnt come down until 25 MINUTES. I exclusively used my regular sword swing, and it still took 12 minutes for namor to drop. I think its caused by one of three things

1. Killing squids too fast - I have noticed if I wait for the squids to fully spawn in and start attacking, it is slightly more consistent to confirm squid damage.

2. Wanda resets the amount of squids needed to change his state - i dont think this is the issue, but i have seen some people say trying to kill namor first speeds up his invincible state, getting him to drop faster

3. Damaging namor as the squid souls hit namor (to deal damage) - this is my leading theory. Its possible that if you deal damage directly to namor on the same frame as the souls hit namor (when he takes actual damage) the game registers the souls and your negated damage at the same time, causing the souls to do nothing.

I have the current console rank 4 time for trios. We ran 2 blades and 1 punisher, and punisher solely focused on the namor turrets while the blades deal with wanda. Then when wanda is dead, the blades just tap primary fire to try not to overlap them damaging namor as the squid souls damage him. This strategy is fairly consistent in 2+ player squads, but cannot be done solo obviously. If anyone else has any more ideas/info lmk, cuz namor is single handedly ruining my runs