Which class Abyss?!

I have just got to the Abyss Nexus selector on the BGs objectives. My 6* roster is pretty good but still missing some key champs at 6 or 7*. Summarised all classes below and what I need. Based on this, what should I go for?! As you can see, Mutant I have the most chance at something useful but I already have 7* Storm, Dazzler, NTW & Sauron and 6* Sinister, Kitty etc so pretty strong on mutant.
Mystic - Only really need Doom so riskiest one to pick but would be my biggest reward!
Mutant - I have a really strong Mutant roster but missing Apoc, Onslaught, Red Mags.
Cosmic - Only really missing Hulkling and Serpent
Science - SILK!!! Also missing Scorpion, Dupe on Spam would be nice too I suppose
Skill - Missing Nick Fury, Aegon...Would also be happy with Kingpin and Zemo Dupe
Tech - Would only really want Fantman Dupe
Mystic - Only really need Doom so riskiest one to pick but would be my biggest reward!
Mutant - I have a really strong Mutant roster but missing Apoc, Onslaught, Red Mags.
Cosmic - Only really missing Hulkling and Serpent
Science - SILK!!! Also missing Scorpion, Dupe on Spam would be nice too I suppose
Skill - Missing Nick Fury, Aegon...Would also be happy with Kingpin and Zemo Dupe
Tech - Would only really want Fantman Dupe
Which class Abyss?! 37 votes
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Comments
I picked skill, because if you're worried about 6 star pulls, Aegon could brute force your way to some more 7 stars, and Fury may be 6* locked for a while and always nice to have him as well.
My second pick would probably be going for Doom, then going for Apoc.
Wouldn't even consider the other 3. You can awaken fant with a gem, and stones, and hulking and scorpion are great, but plenty of 7 stars fill their rolls compared to how aegon or apoc could make a huge gain for you now.
Unless you don't need necro still, or have champs/skill to do without.
And either cosmic or mystic imo
Bgs always had this mid 6* class nexus.