This deck comes after crunching many numbers while running nightmare to find the most optimized build . Here is a brief description of the how's and why's.
Opener - Support Scav, Shoulder Bag, Group Therapy, Field Surgeon ----- This intro is the highest raw healing you are able to put out as doc as your opener. I did the math for each bonus, and group therapy stacked with scav and shoulder bag enables so many drops, with so much raw hp healing ESPECIALLY with field surgeon that it provides more self healing than charitable soul, and more raw healing for your team than simply stacking bonuses or using poultice. This is the strongest way to stay topped up, avoiding trauma damage and downs early game.
Trauma reduction/Downs - Needs of the many, Rousing Speech, Life insurance ------ These are the core of you pulling off any non-defib resurrects. Needs of the Many is OPTIONAL if you have a doc on your team, but a must have if not. There is not point however to starting with needs of the many, as you will lose massive amounts of healing, and without Rousing Speech/Life insurance, you won't be able to safely pick up the downed teamates without massive trauama damage and the use of a defib either way. Thus, these picks should come together, and at this point in the deck.
Icing - Run Like Hell, Experienced EMT, Medical Professional ---- You now have a strong foundation with tons of heal drops, should be able to afford medkits during this phase, and have an abundance of heals dropping on top of the medkits you buy. This order of aquisition is "typically" strongest, but feel free to switch it up. If your team is running an economy character and you're filthy rich and stocked up on 3-5 medkits and 1-2 defibs already, grab Medical professional first. If not, grab Run like hell and then Experienced EMT so you can better run back and forth scavenging for items in cleared rooms, and maximize topping your team of and getting massive value from Experienced EMT as well as your previous cards, all of which stack.
Use Speed, Combat resses, Combat heals - Combat Medic, Headband OR Multitool OR Screw driver. The combo of field surgeon early on wit headband or multiool is INFINITELY stronger than EMT Bag and Screw Driver. The net use speed, stamina bonus, and Healing bonus are all net positives, and massively surpass the other way.
Final Slot- Fanny pack. say less.
Now you have two slots to finish off as you choose--- I use Mad Dash or Dash for some extra mobility while scavenging/kiting bosses, and then Marked for Death to help out with mutations for my team and provide wall hack utlity.
This build is not a frag heavy build. You will frag, and your frags will hopefully be clutch and crucial, but you can hard carry your team just by staying out of danger, watching their flank, making call outs, and hanging back at the right times while using your speed to grab missed items, hold ammo for your dps, and once you have your combat resses/use speed flying, you can even pull off some MAJOR hard carry clutches with ressurrects.