Copy, paste, and pass along...

Damage type to protect against:
Guristas - Kinetic & Thermal
Serpentis - Kinetic & Thermal
Mordus - Kinetic & Thermal
Blood - EM & Thermal
Sansha - EM & Thermal
Angel - Kinetic, EM, Thermal & Explosive
Mercenary - Kinetic, EM, Thermal & Explosive
Rogue Drones - Kinetic, EM, Thermal & Explosive

Main Damage type to shoot at the enemy:
Guristas = Kinetic
Angel = Explosive
Serpentis = Kinetic
Blood Raider = EM
Sansha = EM
Rogue Drones = EM
EoM = Kinetic

Time to complete skills = (M*250*(4*√2)^R - C) / (25.5 + p + s/2 + I)

M = multiplier
R = current skill rank
C = already trained points
p/s = primary/secondary attributes
I = total implant contribution (p + s/2)