Notes & Combos
Fun deck that has decent plays into Fuwalos/Maxx C. Try to go into your fiendsmith lines first and get to Caesar to play around nibiru and/or retaliating C, which seemed to be picking up in popularity over my climb to M1 and is quite crushing for this deck.
It does suck that playing around ash often requires playing into droll, but droll is not anywhere near as common so if they have it they have it.
Closed moon rarely came up, without the main deck lacrima it not being full fiendsmith combo really hurts. Most common use was when you don't have any chimera cards. Say you have only deception + HTs:
deception -> rcielago -> NS anything -> closed moon -> recycle azamina
Having caesar + desirae + apo is probably a bit superfluous. sp, ip, and chimera the illusion beast are other possible ED options but none of them would swing enough games to warrant inclusion imo. Running Superpoly + targets is probably a viable alternative as well.

Thanks for the notes it helps a lot <3 Do you prioritize getting Diabellze out or is it just a bonus to the endboard if you can?

Diabellze is just a bonus to the endboard, you don't get to it in a 1-card combo from nightmare apprentice (1.5 card technically). In general, you only have 2 potential times where you can search diabellze (nightmare apprentice summon, gazelle after fusion).
In a standard combo line starting with nightmare apprentice, you grab coatl -> search mirror knight -> NS mirror knight -> SS gazelle. Then you fusion summon berfomet with the gazelle + nightmare apprentice and your gazelle effect activates to search for elzette to go into your azamina lines.
This is specifically when you open nightmare apprentice, but in most lines your 2 illusion searches want to be used in this way. If you already start with one of the search targets (e.g. you start with nightmare apprentice + gazelle/swordknight/elzette/other azamina access), you can search diabellze, and summon her for free after your azamina plays.
There are janky lines where berfomet sends diabellze to GY and you use moa regina to revive her, but you would need to either have a very specific hand or make serious concessions for going into fiendsmith/azamina lines because berfomet send necrom is the most common way to get fiendsmith combo and elzette will typically be your moa regina revive target.

Read my comment to BaconPancakes, there isn't a good 1-card combo to get her on the field. Here is a powerful combo with Nightmare Apprentice + Gazelle that ends with diabellze in your endboard. Keep in mind this entire combo can be done with just Nightmare Apprentice and the only difference is that endboard wont have diabellze.
SS Nightmare Apprentice, pitch any card but gazelle. Search diabellze.
NS Gazelle, search chimera fusion.
Activate chimera fusion to make berfomet using gazelle + nightmare apprentice as material.
CL1 Berfomet, CL2 Gazelle. Gazelle searches elzette, berfomet sends necrom.
Activate chimera fusion in GY to return it to hand.
------------- Azamina Lines -----------------
SS elzette using her own effect. Activate to fuse into Moa Regina using herself and berfomet.
Activate Moa Regina to revive elzette.
Synchro into chaos angel using elzette + moa regina
Activate elzette's synchro summon effect to search deception.
Activate deception, send chaos angel, search hallowed azamina.
Activate hallowed azamina, fusion into Rcielago sending deception.
Activate Rcielago to search for wanted sinful spoils.
Activate Hallowed azamina in graveyard to return elzette to deck, returning hallowed azamina to hand.
CL1 hallowed azamina, CL2 wanted sinful spoils. Wanted grabs diabellstar, azamina sends wanted to summon silvia.
With wanted sinful spoils in graveyard, you can SS diabellze using her inherent summon effect (!!!!!!!!!!!!!!)
------------- Fiendsmith tangent ---------------
activate necrom, banish self from GY to summon adusted gold.
adusted gold link into requiem
requiem tributes self to summon engraver
requiem effect in GY equip to engraver
Summon diabellstar sending the equipped requiem, diabellstar sets morrian.
Just for bookkeeping, our board at this point is: Diabellze, Diabellstar, Silvia, Rielago, Engraver + set morrian.
Link off Engraver + Diabellstar for Sequence. Activate Sequence to fusion summon Lacrima by returning adusted gold + requiem to deck.
Lacrima returns engraver to hand
Activate engraver in hand to send itself to GY to add tract
Activate tract to add lurrie, send lurrie, summon lurrie.
Summon Apollousa using sequence + lurrie + Silvia.
Activate engraver GY effect to summon itself by sending sequence back to ED.
Summon Wave High King Caesar using Lacrima + Engraver.
Set Chimera Fusion.
Your endboard has Apollo (3 negates), Diabellze (pop+floodgate), Caesar (2 negates), Silvia (omni-negate), morrian (book of moon effect), chimera fusion (fusing into guardian chimera hopefully). For ~9 disruptions. You can use the wanted sinful spoils GY effect to draw 1 or you can keep it there so that deception sets itself in EP for additional followup.

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