It depends on where the ranger is in relation to the target. Bow 2 can be evaded either by dodging or placing something between you and the bow with that build. The arrows do not pierce. Meaning you can put an object, NPC. tree., etc in between you and the ranger. Just try to line of sight his skill. The gs 2 has a lag time and easily identifiable mechanic and again can be dodged and or sidestepped.
If the ranger can get the opener and your not paying attention your dead. If you keep aware of your surroundings you can put yourself in a more favorable place to survive and once the ranger drops their cd's you have a better chance to kill. them.