This is my personal Malefic deck I use for fun/casual play.
The best, but very inconsistent combo that deck allows is this.
If you get Malefic Stardust in you opening hand without Territory, and you have something else you'd rather play like a Malefic Rainbow or Cyber End, then ideally summon the stardust BEFORE bringing out Malefic World so that you can have a normal Stardust banished for Later.
(Worth noting that if you have a selector and are trying to get territory. but you nothing in your GY, summon Malefic monsters so you have banish fodder. Then bring out Territory and a Malefic of your choice)
Once you are able to get Territory out, use Malefic World's ability during your next draw phase to get Paradigm in your hand (if you can, use Malefic World to get selector instead so that you can get an extra card on top of Paradigm). Then summon Paradigm and activate his effect. By sending Paradox Gear to the Graveyard you can Get the regular Stardust back from your banish pile in addition to any other Malefics you have. This is a free negate to keep your beatsticks from being destroyed.
Against Synchro decks, make an effort to use Paradox Gear to get Paradox Dragon out, which you can use to steal a Synchro from their Graveyard.