For anyone having issues with the fishing might I suggest a nice scenic visit to Belethor.

On summons: Frost Atronach is excellent at blocking up doorways. Especially if you then spray Ice Storms over the top of him.

My rogue types tend to be squishy and so they like hitting up Sanguine to get the Sanguine Rose. Conjuring a large angry tank helps you get away more often than you might think.