Which combination of these skills you use are encounter and situation dependent. For example, Bandage Self is a strong group heal, thanks to Medical Dispersion Field. Using this off of cooldown in an encounter with low healing pressure may be fine, but in encounters where you need to respond to large damage pressure, you should prioritize using other skills to upkeep Quickness so as to have Bandage Self to heal.
While Heal Scrapper is not using any elixir utility skills, it has Elixir skills under his kits, those will apply Might with HGH :
As compared to the other popular Heal Engineer build Boon Heal Mechanist, Heal Quickness Scrapper has more and stronger healing abilities thanks to Med Kit. However, your heals often have a very limited range. Make sure to be close to your group when you enter Med Kit!
This build has a number of modifiers that crank up both your healing output and input. Specifically, Soothing Detonation heals for every tool belt skill, while Health Insurance increases your outgoing heals from Med Kit by 20% and increases your incoming heals by 10%. Additionally, Medical Dispersion Field shares your self-heal with your squad, making any panic heals also support your allies.