How to interrupt casters on my 51 Ranger?

[Woodrow]

My ranger has always struggled with casters because I haven’t figured out how to interrupt their casting. As I see it my options are:
- kick (doesn’t seem to do much)
- weapon proc (too random)
- weapon “push” (ie. moving an enemy thereby interrupting them) (I don’t understand this mechanic really but I think more hits = more push?)
- spells (I’m not aware of a quick spell I can fire off when a caster starts to cast that will interrupt)

What do?