Bone Spear Necro needs help with overwhelming information. Please help!

Hello everyone: I am a level 100 bone spear necro. I have followed guides as best I could in building my character and love the way it plays, BUT now that I have been lvl 100 for about a month now I feel like I am not doing something right. I cannot do the Pit past lvl 25 and it took me almost 5 mins to beat Duriel (barely). I have focused mostly on INT for my stats and they are STR 259, INT 1,221, WILL 423 and DEX 393.
My gear is mostly single * INT with a 2H Sword with +150% crit damage.
My attack power is 22,545 and my armor is 17060 and Life 20,334

There is so much more I have to ask but am I on the right track at least with these stats. If anyone would care to message me, I would really appreciate that as I am super lost right now and obviously not smart enough for this game.
I have questions about gear and all sorts of stuff that I need to have a conversation with someone who knows because I get very overwhelmed with the guides.

Thank you to anyone that takes notice. Any advice is much appreciated.

have a great day

Having trouble with pit level 25 is a bit of a problem. Is your build capable of going deeper?
Lots of crap build guides out there as well. Suggest you follow “Macroboiboi” build guides, he is a top necro streamer.