I think you can use dark grepher because this card can be special summoner from hand discarding a level 5 or higher dark monster, and you can discard 1 dark monster to send 1 dark monster from your deck to your graveyard... Dark grepher has a good atk and def 1700/1600, is warrior, is dark, is level 4 can be searched with reinforcement of the army or special summon from the deck by summoner monk eff... A simple combo, example: normal summoner monk (eff change to def) discard 1 spell card special summonk grepher from deck, eff grepher discard 1 dark and send 1 dark from your deck to grave (any vampire for example), xyz summon lavalval chain, eff send mezuki from deck to grave, eff mezuki banish special vapire from grave and stuff... If you want, you can make some changes in the combo, for example special zombie master from deck by summoner's eff or goblin or turtle, you decide... I think Piramyd Turtle is a very good card must be use x 3, is only a tip... Turtle stop many otk bassed on massive atack... 1 plaguespreader is a good option or pain painter to synchro summon Archfiend Zombie Skull and make semi-immortal the zombies, the Archfiend Zombie Skull can be in extra x 1... Revived King Ha Des is a very good card, you can use it x 1... An extra option for main deck is Destiny Hero Malicious (is level 6), you can make good combos with synchro or xyz (is a extra option for main deck)... Dark Armed Dragon is a good option too...
About traps, use the necessary traps, don't overcharge the deck with traps... This deck need protect the monsters... use royal decree or trap stun and more spells like Mystical Space Typhoon or Night Beam, dark hole, mind control, ... Ussing more spells you can use the summoner monk increases the probability to use summoner's eff... Another good option can be Reasoning...
I hope I've helped a little... ^^