I need to get better at line wraps and mid airs. Hard to practice alone. Any tips?
As Ken says, practice flying without watching your plane. It should hang out on the lines well enough that you can feel what it's doing, as long as your arm is pointed at it. Practice eights, outside loop, then inside loop. A standard defensive maneuver. Try to find out how low you can do them and never let the plane go vertical in the middle- pull out almost to level flight and let the plane climb a quarter lap or so and then go the other direction.
Always try to see how the wrap started while watching the tip of the other streamer.. Common thing that happens, the lead pilot does an outside(as above) the trailing pilot over reacts and follows too soon, goes to far around the loop and recovers too soon, setting up a near head on pass(if the other pilot doesn't stretch out his inverted climb). A head on pass is very difficult to see which way the lines cross.
Another common situation is one pilot does a near wingover to come down on the opponent's lines with the lines crossed to try for a cut. Once the lines touch they are half tangled. If your on the left and your lines are on top whatever happens you'll have to fly an outside loop around the other plane to finally clear the line tangle.
If you're on the left and your lines are under you'll have to do an inside to finally clear the tangle.
If you're on the right it's the exact opposite. Right-over-> inside Right-under-> outside.
The best thing is to beg, borrow, or bribe someone to practice with you.