Aside from Mound of the bound creator and march of the monarchs are there any good cards that can make summoning an Egyptian God stick around?

Im making some casual decks to play with friends and ideally I would like to make 3 each a reference to the anime;

Spellcaster Slifer deck (CONTROL), Dark Magician engine with Dark Magician girl for stall and spam. I love this idea, lots of spell negation, I added 3x Silent Magician to negate spell once per turn, along with Magician Navigation and others. It can generate lots of card advantage summoning Berry Magician Girl and Apprentice Illusion Magician, not to mention Silent Magician gains atk per card in hand synergies with Slifer style deck. Slifer has my favorite effect in the game, nothing cooler then blasting away anything with 2000 less atk. The issue in my current build is its a win more card if I have 3 monsters out the combined atk is way higher then Slifer, also the issue with all the Gods they arent very good, too high a cost and can easily be removed. Mound and March of monarchs dont really suit this deck. Finally no good search for Slifer so im thinking running 2 of.

Blue Eyes Obelisk deck (BEATDOWN), Blue eyes style beat down with Obelisk, easier I would think to make since Obelisk is the only real decent God Card. Lots of cards to swarm and get Blue Eyes out even can try Dragon Revival Rhapsody variant.

Gravekeeper's Ra (OTK/STUN), Finally the worst of the Gods imo Ra, I was thinking setting this up more like an OTK, I love Gravekeepers, love stunning opponents and they sort of lack a good boss monster, maybe can set up cards to stall play defensive then have a big Ra for game?

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Also is there any way to incorporate the mediocre God Support, The True Name and Card Advance. Maybe im not familiar with the combos, I thought maybe in Slifer deck since there is not a good search from Slifer and somewhat synergizes with Dark Magical Circle?