If you're soloing its fine to let the enemy come to you. The only time you need to have distance between you and an enemy is to start your combos. The initial weaponskills are the only ones that have distance requirements. Just run away when the enemy is in the middle of attacking or using a skill and fire off the combo starter, the distance requirement isn't too large. Alternatively, you can use Shadowbind (try increasing your PIE if you are having trouble getting the Bind effect to land) to get some distance or gain TP on the first enemy in a chain and use that TP to start the combo to engage the next enemy.

There is no longer any sort of accuracy penalty for standing near enemies, as it hurts soloing. You can get TP from your melee swings in between bow shots, anyways.