I never really thought of Megaman as a possible char to use…Megaman would work well with Cammy as an assist. Her cannon spike can protect Megaman from major aerial attacks since Megaman is a small character. I know that Cammy and Felicia have good DHCs (Ex. Felicia’s Help the Kitty DHCed into Cammy’s KBA is pretty useful.)
Doom might have a good time with Felicia and Megaman since they can both build meter fast, but Felicia’s supers are pretty useful, so Doom can’t be your meter waster.
My suggestion: Instead of Doom, put Cammy in. If you want to have Doom, then switch him and Cammy. Here’s the order to recommend:
Megaman (don’t know good assist)/ Cammy AA/ Felicia Ground
Reasoning: Megaman’s slight lack of mobility makes him a target to fast rushers like Mags, Storm, and Rogue. Cammy’s AA can keep him slightly protected. Just don’t get predictable with calling Cammy. Even though she doesn’t take bad damage as an assist, she has long recovery and can be an easy prey. Megaman’s basic goal is to get as much damage as possible in any means, but mainly, he gets the meter for Felicia and Cammy
Cammy: With the supers from Megaman, you have enough do setup for Cammy’s KBA. For a small amount of hits, it takes good damage off. Felicia’s assist may or may not have its benefits. Her kitty litter sweep can leave space, but it also leaves her vulnerable. Use Cammy’s speed to utilize their attacks on Felicia; in other words, use Felicia as bait if desperate.
Felicia: Cammy should be your final character (Megaman can hold his own, but not as much as Felicia and Cammy), so try to do a DHC by connecting Cammy’s Spin Drive Smasher into Felicia’s Super Kitty Litter Attack. Felicia has Cammy to somewhat fend off rushers like Megaman had, but with Cammy’s lesser life, she can’t be called out as much. Felicia has good throws, so throw when you get the chance (Her scratches can gain up to 2 meters of executed right).
Overall synopsis: This team has its drawbacks. It can’t fare well against keepaways, especially a running Storm. None of them, with the exeception of Cammy, can get high enough to reach her. Felicia, like Morrigan, doesn’t take damage well, so you have to use caution with her.
EDIT: Buck’s right. We can say our ideas and views, but ultimately, the characters you want to use and choose to develop are your choice. How you play your people depends on you. All our comments and criticisms are positive, but you can choose what to and not to incorporate into your own way of playing.
From a personal view, I play Air style, so my opinions about characters will be slightly different from someone who mostly plays ground rushdown or keepaway. In the end, all you need is common understanding. That is the best advice a person can give you.