King Calamity is the best card to get out.
2 card combo for calamity is mausoleum + sage (set mausoleum>summon sage>search maiden> summon maiden>target maiden with mausoleum and summon a blue eyes>synchro into spirit dragon>tag out spirit with stardust>summon cloudcastle>revive spirit dragon with cloudcastle)
Heart earth dragon lockdown is great if you're able, with spirit dragon or union carrier to equip dragon buster to keep your opponent from doing things.
Numeron swings for game. (highest I've ever gotten him is 36k attack, EDOpro replay for that below)
https://drive.google.com/file/d/1oCDox7VhUgXqEiUI-du2XtAMJvXmg-Mw/view?usp=sharing