Just learn simple combos that accurately worked for you so chances of dropping combos is unlikely. Footsies, spacing, whiff punishes using those online is eliminated with all the jumping and hop overs constantly. It makes you play bad, encourages jumping ...now you start jump punching in the air for air to air combos and cross up with a jip to land a combo. It's disgusting. Next when you play a solid player with spacing, those bad habits you play general players lobbies get punished by AA, being a strategic player who wants to personally level up should arrange private King of the Hill rooms for better practice in case he/she may want to attend an offline tournament. With that said, just zone out the scrubby jumper or if you got a Teleport Kick like Mileena, that should keep them to sit still for once. BTW, I'm finding out almost every new beginner blocks Mileena's wake up attacks like they are expecting it every time. It made me laugh.