Damage type to tank against:

Angels: Omni, primarily Exp/Kin
Guristas: Kin/Therm
Serpentis: Therm/Kin
Sansha: EM/Therm
Blood: EM/Therm
Amarr: EM/Therm
Caldari: Kin/Therm
Gallente: Therm/Kin
EoM: Kin/Therm
Seven: Omni, mainly Therm
Mercenaries: Omni, mainly Therm/EM
Rogue Drones: Omni, primarily EM/Exp
Sleepers: Omni

Damage types to deal: Same or:
Angels: Exp/Kin
EoM: Kin/Therm
Seven: Therm
Rogue Drones: EM for L1-L3, Exp for L4
Mercenaries: Therm

Stacking penalty mod
1st: 100%
2nd: 86.9%
3rd: 57.1%
4th: 28.3%
5th: 10.6%
note: modules with highest bonuses are calculated first.
Sec status:
Below -2 = not in 1.0 sec systems
Below -2.5 = not in 0.9 sec systems
Below -3 = not in 0.8 sec systems
Below -3.5 = not in 0.7 systems
Below -4 = not in 0.6
Below -4.5 = not in 0.5 systems
-5 or below = KOS in all empire.