Question for those who design decks for DP and use them

[I Hate Snatch Steal]

I'm wondering if the key to a good created card deck comes from starting with the right concept or a cycle testing and then adding support to cover your deck's flaws or some combination thereof or something else entirely. Right now I could use some advice on how to make a good created card deck since recent tag duel results againts Lightsworn paired with either Nekroz or Heraldic Beasts say I can't seem to do it on my own.

 

Note: I don't personally use duel portal anymore, I use YGO pro since I know how to write code for it but since a lot of people use duel portal I figure someone might know the answers I seek.

[asterr259]

Personally, I start off with a concept "What do I want my deck to do?" I think that's the best step before you end up making cards willy-nilly and have useless cards in your that don't contribute to the goal. Starting off small is always good. Most people try to make a complete Archetype right off the bat. Around 6 Main Deck Members, and 3 or 4 S/T Support Cards and Extra Deck members. This obviously varies depending on what your deck is, so it's just an example. Then I usually compare it to other decks; real decks that are similar. Though decks like BA and Tellerknights may not be the healthiest thing to compare to, finding a balance is key. Afterwards I usually indulge in several matches worth of play testing. Every deck has its weaknesses so there's no point in trying to make something flawless, but starting off small, you're free to add in whatever you thinks helps the flow of the deck.

 

But that's just me.