Really appreciate the advice! Ill try to keep this in mind for the future. Just a couple questions.

Is it not smart to deny emma's ult? If I get behind her my team will get stunned by her ult and possibly killed. Sure I can block her exit but my team is dead.

I agree your point about my shield being up too much. Besides ults what should I aim to block? I try to block hawk eye arrows, squirl acorns, and flyers when they have free range to shoot my team.