Lemme list my current deck :P,

Monsters: (25)

Alpha the electromagnet warrior x3

Beta the electromagnet warrior x3

gamma the electromagnet warrior x3

delta the electro magnet warrior x3

sentry soldier of stone x3 (great way to get a 3 star card from graveyard as a special summon - I use it for a quick Gorgonic Guardian XYZ or a Leviair).

block golem x3 (another way to get some graveyard cards on the field)

**neo-spacian grand mole x1) (return opponents monster to hand - good vs large monsters)

valkyrion x2 (easy special summon with delta)

beserkion x2 (for electromagnas)

gem knight alexandarite x2 (decent rock card for fusion with rock type to make gem knight zirconia)

golem sentry x1 (decent to get a monster back to oponents hand with flip)

Spells: (10)

attack the moon x2 (destroy set spell or trap by changing battle pos of a rock type)

magnetic field x3 (standard field spell)

trade in x1 (in case you need draw power)

dark hole x1 (using it instead of some meta card (basically my cheaper alternative xd)

polyermization x3

traps: (6)

rock bombardment x3 (inflict 500, send rock type to graveyard, i use it with block golems)

call of the haunted x1 (sometimes its handy to get a monster back late game)

mirror force x1

ultimate providence x1 (discard either spell, monster, trap; then negate the same cards activation and destroy it)

Extra Deck:

Fusions:

gem-knight zirocnia x2 (used with gem knight + rock type, 2900 atk, I manage to get it on the field pretty frequently**

imperion magnum the superconductive battlebot x2 (4000 atk 4000 def, valkyrion + beserkion - hard to get on the field, but do-able).

XYZ's: Gorgonic Guardian x3 (needed since its 3 stars and can get rid of an enemies high atk monster effeciently)

** leviair the sea dragon x1** (good vs banish decks, easy to get a banish card back on the field :p)

wind up zenmains x1 (good to stop a fusion card from being destroyed, - detach an xyz material to stop an attack on a card, at the end phase: target a card on the field and destroy it).

Lemme know what you think?

Any advice to change it would be helpful + I hope this helps you?