This will be more of a rant than anything else. The boss in this event is Magneto, the Raider cards are Psychic Katana Psylocke, Cosmic Energy Havok, and Wind-Rider Storm.
Although I find Storm an acceptable X-Men to face Magneto, the other two are just frivolous. Neither Psylocke nor Havok could come anywhere near defeating Magneto. Realistically the card that should have been released was Charles Xavier since he's at least a nemesis. One top of that Phoenix is one of the only X-Men that can defeat Magneto meaning she should have been given the buff for this event.
Magneto is one of the strongest most loved villains in comic book history and half assing card decisions irritates the hell out of me. Just wanted to rant about it.
That being said:
The base cards for Havoc and Storm will offer 300% boosts individually and 800% if fused. It is also possible that one of them will offer a higher buff.
Psychic Katana Psylocke will offer a 600% boost individually and 1800% boost if fused.
I'll wager that 1/2 way through the event another card is released of SSR quality that offers 1000% boost individually and 2500% boost when fused. I can only hope it's an Xavier.
One quick idea:
Being as Magneto has only really been defeated by team efforts outside of bad writing I think there should have been a special combo that did additional damage. For example if you had Angel, Marvel Girl, Cyclops, Iceman, Beast you have the Uncanny X-Men. But this would have required the developers to care about Marvel.
Just a thought.
**Added after event started**
Actual Raider Cards:
Cosmic Energy Havoc: 200% base, 300% fused bonus. He is one of the unfortunate cards that loses effectiveness when fused. It is still recommended to fuse him since you will save attack power.
Precise shot Hawkeye: 200% base, 300% fused bonus. He is one of the unfortunate cards that loses effectiveness when
fused. It is still recommended to fuse him since you will save attack
Wind-Rider Storm: 300% base, 700% fused bonus. Good buff overall when fused that is 200% more powerful than one base Psylocke
Lady Liberty She Hulk: 400% base, 600% fused bonus. The final of the unfortunate cards that loses effectiveness when fused. It is still recommended to fuse her since it wills ave on attack power.
Psychic Katana Psylocke: 500% base, 1200% fused. Great buff overall when fused it is 200% more powerful than one base cyclops.
Mind of Matter Xavier: 800% base, 1800% fused. Only being 200% shy of Cyclops makes this probably the most reasonable raid card for this event.
Genuine Leader Cyclops: 1000% base, 2000% fused. The best raider card for this event.
For a solid starting card into the event She-Hulk gives a pretty solid buff until you can gain two storms. After that I recommend running Storm and two she hulks in your attacks. There is no reason to use a full deck of cards in this event unless they are all at a high percentage boost.
Ideally based on price of cards and bonus offered, I would recommend ignoring cyclops. His price will be too high to be worth picking up. Instead focus on grabbing Xavier's and Psyclockes since their buffs are substantial.