Best to get Advanced packs for Uncommon mods?

The first item in a crate will not be a mod unless there is no other option.

You need to get a second silver card to have a chance at getting a mod at equal rate as other items on that card.

You are more likely to get a silver card in a gold pack than a second silver in a silver pack. Meaning gold packs drop weapon mods more than silver until you have all other silvers.

After I maxed out all my uncommon weapons and characters the store seemed to prefer giving me rare guns over uncommon mods in Advanced packs. That went on for about 6-8 packs then the rare guns stopped and now it's just mods and I have about 30 silver mod cards to go. So yea, moving up to Expert packs seems to be the smart move.

The drops are heavily weighted against mods. Character > Weapon >>>>>>>>>>>>>>>> Mod.

After finishing uncommon weapons and chars the advanced packs usually give me 1 or 2 uncommon mods per pack which makes it a better choice than the more expensive packs if you want to max these asap

This is where I'm at right now, every uncommon character and weapon is maxed and advanced packs are giving me mods at a steady rate.