Talk:Damage/Corrosive Damage/@comment-82.1.56.6-20170309101240/@comment-25254386-20170310081544

You would want lots of Corrosion against both low-mid level Grineer units and any level Ancients. The proc is best used against all levels of Grineer to strip their armor.

Against Lephantis you definitely wanna use as much Corrosive damage as possible, its only health is Fossilized, making it very weak to Corrosive and fairly weak to Blast. However, having a high stat chance is not necessary to beat him, as a Corrosive proc will not actually have any affect on it due to its lack of armor.

For other bosses it is completely dependent on whether or not they have armor. Most bosses do, so it would be best to have a weapon that can reliably proc Corrosive. You should note, however, that if you have more than one type of damage on your weapon, the chance of you procing a specific damage is based on the ratio of it and the total damage.

To give an example, say you have a weapon with 100 Corrosive damage, 50 Blast damage, and 100% stat chance. The chance of you doing a Corrosive proc is 100 / (100 + 50) = 66.67%, while that chance you'll do a Blast proc is 50 / (100 + 50) = 33.33%. That being said, if you want to proc Corrosive damage then make sure either you only build for Corrosive and status, or you have more Corrosive damage than the other individual damage type(s).