In this article I will summarize World Boss(Ultimate difficulty) Guide.
1. 
Proxima Midnight
Proxima Midnight is vulnerable to Physical Attack.
Recommended Characters : 
2. 
Black Dwarf
Proxima Midnight is vulnerable to Energy damage.
Recommended Characters : 
3. 
Corvus Glaive
Corvus Glaive has high dodge rate. Leaders who have leader skill that ignore target’s dodge rate is recommended.
Recommended Leader Characters : 
In addition we can take 5 additional allies to World Boss. Some allies have ‘Ignore target’s Dodge Rate by 20%.’ So select allies with the effect. If you can select 3 or more allies with the effect then you don’t need to take leader with ‘ignore target’s dodge rate’ and in that case leaders who increase physical attack or energy attack is more useful.
Allies with ‘ignore target’s Dodge Rate by 20%.’ are listed below:
Black Widow
Mockingbird
Agent13
Deathlok
Songbird
Misty Knight
Hawkeye(Kate Bishop)
Agent Venom
Wasp(Nadia Van Dyne)
*6 Rank is required to take World Boss. Black Widow, Mockingbird, Agent13 and Deathlok are easy to make 6 star. They requrie 1/2 biometrics compared to other normal characters.
4. 
Super Giant
Super Giant for Ultimate difficulty is not opened yet.
5. 
Ebony Maw
Proxima Midnight is vulnerable to element damage such as mind and lightning.
Recommended Characters : 
6. 
Thanos
Thanos is quite strong. It seems he has no vulnerability. To defeat Thanos you need to make your characters strong and should understand his attack patterns. If you are not strong enough to defeat Thanos then just give up for now and defeat other world bosses to get items for Tier-3.
Recommended Characters :
7. Quicksilver
Quicksilver for Ultimate difficulty is not opened yet.
8. Cable
Cable for Ultimate difficulty is not opened yet.
9. Scarlet Witch
Scarlet Witch for Ultimate difficulty is not opened yet.
10. Apocalypse
Apocalypse for Ultimate difficulty is not opened yet.
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