Ive been shopping around for items in game and im stuck on what ones to buy and such cuz of their stats. i know they are updating this game very often and constantly changing upgrade caps and such

but currently for the patch as of right now what is the max number of upgrades for pets, armors, and weapons

also what are the current skill caps for pets, armors, and weapons.

i know pets can cap at 126 stats , is this the same for armors and weapons?

any information would be great, i tried google for my answer and wasnt able to find anything useful towards my question

The only for sure answer is that stat cap is 126 across the board. With modders around there will never really be a cap unless stated otherwise by Trendy via patch notes like they stated with stat caps. I keep up with all patch notes usually and no where have I seen trendy state an "official" cap due to almost each and every patch throwing in more "uber" items.

While we're answering some questions, I've got one about monster immunities. Do the fire immune monsters deal fire damage? And the poison immunes deal poison damage and so forth?

yes

One thing to keep in mind about caps. 126 is the cap because of a programmer error. With the increasing difficulty of content, they're bound to increase it, so, for example, if you had a pet that was 100 all stats and 150 upgrades, upgrading each stat to 126 and spreading the points out is probably not the best investment, and will be invalidated next patch (again).