Roster Advice: CMags or Black Panther?

I got some new covers, but I only have roster space for one. They are red/blue Classic 3 star Magneto, blue Black Panther, and green Classic Bullseye. I'm probably not going with Bullseye but figured I'd include it since I have one.

3 star magneto (CMags, usually) is an awesome character. He does incredible damage once you level him up. His red is decent damage (depending on board composition) but it is a great cascade activator. It also is relatively cheap. I use it over LThor's red.

His blue is very high damage. It makes a great finisher, and again, it doesn't break the bank. There are those really rare times where you don't have any red or blue tiles on the board to swap, but I generally never have trouble getting it to fire. I rate it highly on the cost/damage balance sheet.

His yellow isn't really worthwhile, it blocks so little damage that it just becomes bait for moves that steal special tiles or deal damage based on them.

As for Black Panther, he is very strong as well. Good health for tanking. His yellow activates based on your saved team up AP, which I personally usually have plenty of. The strike tiles it lays down are really strong, on the other hand, it does require them to sit on the board for a few turns for max value.

His black is an incredibly strong move with a downside. It hits all enemy characters, which is always worth hanging onto in MPQ. At max level its 3,708 damage to all characters, which is about as good as you will find. Plus, most other characters don't use black AP, so its easy to save. The problem is that it goes give 5 AP in the enemy's strongest color, which shouldn't be overlooked. You will almost certainly give them the AP to fire a special in return. Thus, it works best as a finisher.

His blue is pretty dumb in my opinion, it requires a countdown and even then the tile it creates isn't that strong.

Bullseye is interesting, and I think his black passive has some real potential, but I'm not yet buying. Pass for me.

If I were you, I'd save the CMags. The value of having two colors is really helpful as well, you need 9 covers before a 3 star is useful, so CMags is already that much closer. Plus, the blue cover is Panther's worst power.

2 Star Character Guide: Bullseye - Dark Avengers Hawkeye

Bullseye is unfortunately one of the weakest 2 star characters. Although his passive is decent, his single other move is weak in all but the rarest of circumstances. 

Purple - Adamantium Bones: Bullseye's purple power is a passive, Adamantium Bones. This creates a Protect tile on a purple match by either team. These can eventually slow the enemy down. Since either team's match creates one, it often isn't long before the board is getting crowded. Also, anytime your opponent matches one to destroy it, another is formed in its place.  At the same time, moves like Daredevil's purple are perfectly suited counters, creating the tiles and then immediately using that purple AP to destroy them. 

Black - Murderous Aim: Murderous Aim has the potential to be the strongest move in the game. Except that it can never, ever be so. Murderous Aim creates 2 critical tiles at max level. If after those are created there are a total of 4 critical tiles on the board, he deals an additional 8,200 damage at max level. 8200 damage kills pretty much every single 2 star character, and a fair number of 3 star characters, in one shot. The additional damage done by four critical tiles should just about wipe the rest of the team, plus the resulting AP would charge almost all of your moves. However, the chances of this occurring are so low as to be impossible. Even if you were to save for two uses (which is a solid 32 black AP, by the way), finding places on the board to set a critical without it matching are tough. The only benefit to this move is that the player selects the critical tiles location, and while it can't directly target a special tile, it can be used to match with them. 

PVP Summary: Adamantium Bones actually works pretty well against most teams, but his overall weaknesses don't make up for it. 

PVE Summary: You can use Murderous Aim to try to remove countdown tiles, but that is about it. His purple move is pretty useless against computer teams. 

Team UP: Murderous Aim actually is a nice team up to select. It allows you one get out of trouble card by easily matching with a stubborn countdown or special tile, and can provide the critical hit you need to get you over a hump. Also, since it is just creating a critical tile, you can use it at any level with equal effect. 

Match Ups: Falcon immediately springs to mind, powering up some of the protect tiles could really mess up an enemy team. Bullseye also provides a good way to unload your black AP, which few other characters do. 

Counters: No one particular, maybe someone who wants purple AP as to charge they will have to put up your protect tiles.