Monster
1 Big Piece Golem
3 Gate Gaurdain
3 Kazejin
1 Medium Piece Golem
3 Sagan of the Thunder
1 Small Piece Golem
3 Suijin

Extra
3 Multiple Piece Golem

what other cards can go w/ these monsters?

Giant rat, and search engines. As well as staples, and etc.

that don't make any sense n fact that's no help

so here we go...
3 Giant Rat
1-2 Elemental Hero Prisma
Spells:
2 MST
1 Monster Reborn
1 Dark hole
1 Heavy Storm
2-3 Polymerization
1-2 Magical Stone Excavation

As for traps:
1 Solemn Judgement
1 Solemn Warning (two if it is semi-limited)
2 Dark Bribe
2 Call of the Haunted
1 Stardust Road (if you add Stardust Dragon into your extra deck it'll be awesome, but it isn't necessary)

I didn't play YGO quite a long time but I'm sure this cards are needed into your deck.

dont forget 3 king of the swamp for poly searcher or fusion substitute. and i think you should have fusion gate too incase u dont have polymerization in hand

Also, sangan is a good card to have to search out for your other search engines and etc.
And geo, search engines are cards that search for any other card, and staples are cards like MST, dark hole, reborn etc/

Ur deck has a lot of high level monsters that need 2 tributes, u better lower those monster to 2 each for consistency,
Also, that can easily be summoned or not easily destroyed could be used for tribute fodder like spirit reaper, cyber dragon, soul exchange etc etc
If all these monsters are rock cause Idk much about them, I could combine them with koaki meiru sandman,wall and guardian
Hope I made sense

i wonder how would all the cards will work n a duel

Well, u can't know until u try them, after all, no pain no gain

Plus, it's good to try like 3 different methods of the deck, than see which one works better. That's what I usually do.

hmm if u want easy summon high level monsters get star blast or cost down ._.
cost down lowers all monsters in your hand's level by 2 and starblast you can pay any multiple of 500 to lower the lv of 1 monster in hand or field by that multiple