I don’t have up/down controls, A/D for sideways (good for The Fortress),
Q for fire, W for special weapons, and E for satellites.
with special weapons cycle left/right being S/2 respectively.
Mouse controls are the same.
I use mouse + keyboard combo controls. Find it a lot more convenient to fire.
I use both mouse, touchpad and keyboard to play.
+) I used mouse only to move by my right hand (which is my dominant hand)
+) I fire my primary weapon by the left mouse button under the touchpad by my left hand’s thumb
+) I used other left hand’s fingers to fire satelites or precision movement (ring finger), special weapons (index finger), cycle special weapons (either index, middle or ring finger)
+) If I wanted to pause or chat, I leave the mouse and press by my right hand’s index finger.
+) I type text by 2 hands so generally I will temporary stop playing to chat.