For this team, you have Storm on point which is good enough for any team.
I usually use Sentinel’s assist to help rush with Storm, trying to cross up the opponent by getting drones on one side and Storm on the other.
Sentinel’s assist and CapCom’s assist will help prevent you from getting rushed as well.
With Storm, learn to combo with CapCom’s assist; it’s too hard to incorporate Sentinel assist into a Storm combo (the drones come out slow and they fall down towards the end).
Your main power-move for Storm is the DHC combo with Sentinel (if you dont’ know, launch, blah blah, Lightning Attack, Lightning Storm, HSF).
For Strider/Doom, just play Storm. Most Strider/Doom players will know better than to take on Storm with the usual tactics, though.
Against Magneto/Storms, try playing Sentinel on point. He’s big, but his super armor makes it somewhat harder for your opponent to get you into a combo.
Storm should be able to counter the Cable.
Against Sentinel, either Storm or Sentinel can be your point, and CapCom will help a LOT when fighting another Sentinel.