Few notes here since I forgot to add them:

-I still like going 2nd with this deck. the deck doesn't really as it has good recovery and trap options after board removal. Keeping the board breaking/removing identity of Cyber Dragon as well as adding another layer of recovery in Eldlich engine.

-I use the Eldlich engine as a board breaking + recovery engine that I can also Xyz summon with. It doesn't make sense to add floodgates such as Rivalry, Skill Drain, Imperial Order, ect to this deck. Gozen synergizes ridiculously well as Light attribute on most monsters and summon limit is summon limit. Good floodgate. Dimensional Barrier could work here as well if you'd like to add that over summon limit but it's a little wasted going 2nd. I would definitely suggest Gozen here.

-Dingirsu probably isn't necessary here. I just like having the removal option with it along with easy access to it through Cyber Twin/Guardian/Fortress. You can probably use the Xyz Rail combo if you'd like. I just felt that wasn't necessary for the dmg output this deck has. Pleiades however is wanted.

-Overflow is very good in this deck. At 2 it shows up in my hand enough and even though its searchable, I just don't want to see 2 in my starting hand.

I have since replaced the 3 summon limit for 3 Evenly Matched. Im all in on going 2nd and board breaking. If I can't OTK, I have anti recovery cards like Gozen Match, Infinity, Pleiades, ect. Plus having the recovery for myself in the Eldlich engine helps a a lot for grinding games as the Xyz monsters in this deck can grind.