Never owned a warhawk but this might work? (rookie build)
http://mwo.smurfy-ne...73fcfcf27b6dcd7
Tried to do the most I could within a certain range and keep the DPS as high as possible. The Warhawk strikes me as the kind of assault that once you engage someone at a specific range since you cant poke, your job is to alpha strike then follow that with DPS over the course of the next few seconds. Particularly with this loadout that might be a sustainable idea. 15 seconds on full to overheat but sure you can manage within that threshold to some degree if your trigger discipline is good. To compare that to the typical IIC I see on the battlefield....
http://mwo.smurfy-ne...8e398c8e721892a similar in spirit but hardly optimal.
Could also go with this :
http://mwo.smurfy-ne...80280b32dfb3661
Though that 2nd one is sorta sketchy for the IIC imo.
Either way you can see using smurfy alone the differences in load out seem fairly consistently to favor the IIC. However, I maintain that if the 70+ something degree arc bothers you on the Marauder and the twist arc on the Warhawk is better then the mechs may fill different roles more easily or just be easier on you to pilot depending on what you do.
Just from these two I'd rather take the Warhawk configuration than the two Marauders if weapons were the only determinant factor. However geometry / etc: matter heavily as well, and as is obvious the Warhawks' a brick. All be it a terrifying brick when it blats you in the face with proper loadout.
As a guy who up until several weeks ago didn't have a handle on either the Night Gyr or the MIIC, when I was on the Shadow Cat a lot i'd run into Whales / Warhawks on occasion. They deleted me quite expertly regardless which one it was to the point where I did not realize there were King fat brick and Minime as clan assaults. Was only later when pointed out that two of the mechs share very similar geometry that I noticed the difference. To this day I still have trouble discerning one from another unless a lock confirms their type.