TorgoTheWhite
Explorer
A bunch of monsters are high mobility, and if you are behind the wall. The enemy also has cover... though not from your summon. Then you have to hope your summon can glue the enemy in place though, instead of them bypassing the summon and now trapping you by a wallAt 1st level? Not before they die generally.
I would not be 100ft away, but probably far enough to make melee difficult and if they do get me in melee I use my familiar for cover and rely on my shield spell and relatively high hir points, while the familiar puts a beat down on them.