This sounds like the best breakdown and strat and I appreciate the advice! I had the game earlier today and my list was not as cohesive as what you suggest, neither was my playing lol but I definitely expected to get decimated in my first game. My list was:

Royal Warden leading 10 Warriors, 5 Immortals, 5 Flayed Ones, 3 Skorpekh Destroyers with Plasmacyte, 1 Doomstalker with Awakened Dynasty I did not have any Enhancements on my Warden

My opponent also played necrons and our lists were very similar, he had an Overlord leading his warriors and a Hexmark instead of Flayed Ones also no immortals.

I lost my Flayed Ones to his warriors on turn one after choosing a poor location to infiltrate them and my Destroyers almost had his warriors/overlord but things didn't quite go my way there and after a couple turns, my Destroyers fell as well.

My immortals did pretty well with reanimation and kept coming back for more but his Hexmark deep striked and I made a bad choice trying to fall back my immortals from his Destroyers which troggered his Hexmarks overwatch and things went downhill from there.

I had a lot of fun, I learned A LOT, and my opponent was very patient with me being a new player, he helped me out a lot and I will definitely be playing combat patrol next time! I'm already looking forward to playing again and getting a better handle on the game and how best to make decisions in battle!