I like to use either doomking and uni-zombie or golden lord and uni-zombie into halq so that you can bring either of the boss monsters back the following turn with their effects. Then you go into halq, summon glow-up and link it out for linkuribo for glow-up blooms effect to activate in the graveyard to special summon a golden lord or doomking from deck. If conquistador is playable have it activated and ready to be used to synchro summon clear wing once halq has switched out to formula. This combo leaves you with a strong board full of negates and once doomking comes back in the next standby phase if zombie world is on the field, the board becomes almost unbreakable along side a number 23 and a 3500 atk golden lord.
Uni-zombie is pivotal for this deck, discarding the correct cards for the field you need can be orchestrated by this card.
You can summon geomathmech sigma with combo: halq into glow-up. Make sure to have golden lord on the field readily available. Next turn, activate halq into formula, chain both its effects and synchro sigma. For additional destruction, it's best to have guardian of the golden land activate in M1 to target an attack facing monster on the opponent's side of the field so that you can make their attack 0 and go into it with sigma for 6000 damage.
I hope you like my line-up, it mashes many boss monsters together in a convenient way I think. You have many choices and decisions to make when playing this deck, a quality I love. I am still looking to improve my deck and become a better player.