Yeosinyi

FACTION DAMAGE TO DEAL DAMAGE TO RESIST Electronic Warfare
Angel Cartel Explosive/Kinetic Explosive(62%)/Kinetic(22%) Target Painters
Blood Raiders EM/Thermal EM 50%)/Thermal(48%) Energy Neutralizers, Tracking Disruptors
Guristas Pirates Kinetic/Thermal Kinetic(79%)/Thermal(18%) ECM
Mordu's Legion Kinetic/EM[1] Kinetic(70%)/Thermal(30%)
Rogue Drones EM/Thermal (varies)[2]
Sansha's Nation (missions/anomalies) EM/Thermal EM(53%)/Thermal(47%) Tracking Disruptors
Serpentis Kinetic/Thermal Thermal (55%)/Kinetic (45%) Sensor Dampeners
Equilibrium of Mankind Kinetic[5] Kinetic(74%)/Thermal(26%)
Khanid Kingdom EM/Thermal Thermal/EM
Mercenaries Kinetic/Thermal Kinetic/Thermal
Sleepers (Omni)[4] (Omni)[4] Energy Neutralizers
Sansha's Nation (incursions) Omni)[4] (Omni)4] (all)
Triglavian Collective (abyss) Explosive/Thermal[6] Thermal(60%)/Explosive (40%) (all except ECM)
Triglavian Collective (invasions) Explosive/Thermal (Omni)[4] (all except ECM)

1. Kinetic dmg is best, EM & Th are both ~75% as effective as kKnetic but EM is better against shields and Mordu's ships have active shields so, its better overall. EMP = best projectiles.
2. Rogue Drones tend to vary wildly in what dmg type they deal & are vulnerable to. Low-lvl missions seem to favor EM/Thermal while high-lvl missions favor Explosive/Kinetic. Consult mission reports about the specific mission or explo site before undocking.
3. Refers to CONCORD enemies in certain missions (particularly low- and null-sec). CONCORD ships patrolling high-sec are invincible, so, dmg types they do is irrelevant.
4. "(Omni)" = ships do all dmg types equally, or are equally vulnerable to all dmg types.
5. Em/Th approx 75% as effective as Kinetic. Explosive around 60% compared to Kinetic. EMP = best projectile ammo.
6. Unless in an Electrical or Exotic filament, in which case use EM or Kinetic respectively.