Part of the reason for the disparity between classes is the removal of stats from the TLE servers. It's kind of ridiculous honestly, and I think special considerations need to be made. Example: Attack speed on one buff (pretty massive amount, too) and nothing on the other. Kind of ridiculous. This is due to the fact that the Assassin one is intended to have MA, but given that MA doesn't exist, the buffs are no longer anywhere near comparable.
rangers are neck and neck with conjuror/necro right now for dps. it's pretty crazy what that class can do.
Assassin's are just as good as summoners/rangers to be honest, especially once EoF hits... this class will be too strong.
rangers can probably hit 50-60% haste on this server now with gear. that's a nasty blast from a 9second bow every 4.5-5 seconds. i'm not seeing what assassins have that could help compete with that right now.