When hunting Liches should I use standard anti-grineer mods or their weaknesses?

[Sasquatchias]

Just a bit of a dumb question, but I was wanting to know if people have more luck fighting their Liches with their weaknesses or the anti-grineer set up - I was a bit dumb and accidentally maxed my first Lich to the max level, and it felt like most of the stuff I owned just tickled her more than anything.

[Gibsonx]

Well my second one had a weakness to magnet. Until I fought him with it, then he developed a resistance to it. So save weaknesses for when you want to kill it, not when you are still trying to find which mods you need for the kill.