Forum:Help, cyber dragon suggestions

hey, I'm a mediocre duelist, me and my friends have gotten back into the game after finishing school and loving it so much as a kid. the game has stepped up a heap, as much as i think i am caught up i am sure i am not. my friend group are getting rather good, and rather serious, i believe we are all about to start competing in local competition, and i would love not to embarrass myself too much... if i had a chance as well, that could be awesome. suggestions please.

a few little notes, would love more speed i am trying to source some galaxy soldier, but am struggling due to money. and one of my friends has a gravekeepers deck, and i have never been able to defeat it, obviously my deck is graveyard dependent so any help for this specifically would be awesome

machines

Monster Cards (Insert Number of Monsters here) 21 cyber dragon x 3 cyber phoenix x 1 a-assult core x 1 b-buster drake x 1 c-crush wyvern x 1 x-head cannon x 1 y-dragon head x 1 z-metal tank x 1 green gadget x 1 red gadget x 1 yellow gadget x 1 gold gadget x 1 silver gadget x 1 jade knight x 2 cannon soldier x 1 black salvo x 2 turbo synchron x 1 Spell Cards (Insert Number of Spells here) 12 overload fusion x2 Power bond x1 limiter removal x1 cybernetic zone x1 scapegoat x 1 de-fusion x 1 frontline base x 1 united we stand x 3 union hanger x1 Trap Cards (Insert Number of Traps here) 7 side effects? x 1 union scramble x 1 mirror force x 1 roll out! x 1 stronghold the moving fortress x 1 cyber summon blaster x 1 call of the haunted x 1 x-head cannon x 1

extra deck
Monster Cards (Insert Number of Monsters here) 15 cyber end dragon x 2 cyber twin dragon x 1 cyber dragon nova x 1 cyber dragon infinity x 1 chimeratech Overdragon x 2 chimeratech fortress Dragon x 1 chimeratech rampage dragon x 1 ABC-dragon buster x 1 XYZ-dragon cannon x 1 A-Z dragon cannon x 1 dark strike fighter x 1 power tool mecha dragon x 1 gear gigant X x 1