If you take Kevlar buff for engineers, and metabolism for medics, you can buff one teammate at the same time at a command post with life buff, metabolism buff, weapon buff, and Kevlar buff.
If you wanna get real fancy you can get improved weapon buff, improved life buff(recommended), and sprint boost. Everywhere you spawn is a nearby spawn post, and you get minimum of 4 life pips (if you have the improved pip ability in general). With a command post you can get +1 or +2 pips if command post is upgraded.
If you got 5 or 6 pips, you can even go to soldier to give them extra ammo, and/or give improved sprint boost, or you can save your last pip for a grenade, etc
Usually my pips go unused as a operative, so I try to do this before I leave spawn. Also I didn’t notice at first, but using a command post refills your ammo.
If you got a ‘twin’ with you, both of you together buff each other at the same time, don’t buff yourself cause once you switch classes self buffs are gone. Also if your a medic and your low on pips, and you got increased supplies ability, or supplies command post upgraded sometimes its better to go rambo to kill yourself so you spawn with all pips refilled, etc I do this usually when the objective is close, or I’m always running on the last pip etc

