Not mostly worthless. I got a bit more than a head nod for my NFO time. Not sure what HALs experience was. When you write your resume give yourself credit for flying a complex turbine aircraft in a very demanding environment. IMC time is IMC time if not more challenging in a helo. Highlight it. Make note of the hours in command. Makes no difference if the wings are flopping over head or welded. You signed for the aircraft and the buck stops with you. Aeronautical decision making is not respective of rotary wing or fixed, or for that matter, a NFO in a required crew position like WSO, ECMO, COTAC, etc. You have mastered the systems of several turbine aircraft. Not much of a chance you will be overwhelmed by the systems ground school for a B737. Every airline handles helo time differently. Not sure now days, but in the past AA was pretty generous to helo bubbas. Don't sell yourself short.