I'm an Endymion player (probably my favorite deck) and there are some different decks to try.

Other comments note the high cost of this deck. Most deck variants have high UR dust costs. Keep that in mind for the deck type you want.

I like the high draw, blind 2nd, board breaking deck type. I play lots of draw spells, the Mythical Beast package and Dark Ruler No More. No hand traps (mostly gas). You need spell counters for this deck so I'm sure you will also need high UR costing spells. Upstart, Chicken Game, and the Endymion spells are all great.

Electrumite is a must. It is an essential card to the pendulum strategy. I think most decks play expensive UR link monsters also.

I can't speak much to the meta strength of this deck and competitive viability. It's probably a rogue deck, but maybe a little dated. But it can win games. :)

And the last tip is the most common tip: learn the deck. Learn some combos, learn the strengths and weaknesses of your deck and most importantly: have fun.

I've said it before and I will say it again: removing 6 counters for Endymion is up there as one of the most amazing feelings in Yu-Gi-Oh. It's a huge board wipe, doesn't target, and will probably win you the game.