Here are my suggestions.
Change the Prototype Cylinders talent to also make HEGC also affect kinetic dmg.
Put a 6s CD on Retractable Blade, reduce the DOT duration to 6s, increase kinetic dmg slightly.
Change Serrated Blades to: Reduces CD of Retractable Blade by 1s, 2pts add stacking DOT and another second off CD, and 3rd pt adds another stack and another second off CD. (3s CD and 3 stacks of DOT)
Change Flame Barrage to: "... chance to reduce active cool down on Rocket Punch by 3s and make it free"
Change Charged Gauntlets to: Rocket Punch as 25% chance to consume all stacks of Retractable Blade increasing the damage of your next Rocket Punch by 8% per stack consumed.
Make Prototype Flame Thrower and single point talent and instead makes FT usable while moving.
Link Kolto Vents to Prototype Cylinder Ventilation, make it 2 pts and change it to "Whenever HEGC vents heat you regen 2% of your max health" per point.
Add Retractable Blade to Prototype Weapon Systems.