Talk:Stalker/@comment-91.210.148.239-20140131115939/@comment-24245085-20140204001356

"he has alloy armor, which resists magnetic, radiation toxin is best, as it does 25% to his proto shields, 75% to his armor, and 50% to his health, viral does the same % to his health as well, but without the bonus 25% to his shields, so radiation toxin is the more preferred" 

Radiation + Cold. Viral will never do the same amount of damage to alloy covered targets as radiation - if you don't believe me check it in the game - and never the same amount of damage to ferrite as corrosive, being the worst possible choice versus grineer. Cold may do not do bonus damage against proto shield but it does against alloy armor