I am Arsenal, which is the mirror of Gunnery so I will do my best.
I honestly do not think there is a true 'viable' option.
http://db.darthhater.com/skill_calc/...f10efefef3ef18
See if that looks better for you. You still maintain getting some healing output while primarily focusing on DPS. If you go the hybrid spec you have linked, heat is going to be a major issue for you and your healing and DPS will be very subpar. That doesn't help your team if you're doing below average when you could be above average DPS and just 'okay' heals.