I would only use 2 Wattaildragons or tech in an Inferno Reckless Summon if you really want to use 3. I also think you'll only need 2 Cardcar D's as there is enough draw power. I'm unsure how PoD would affect your deck. It makes it more stable, but also slows the deck down.

What would be the best replacement? I mean, there arent many cards which fit in.

They're all light monsters, so work your magic.

you do know that there is a trap that works like honest but only for light dragons

Take out the Maxx C's, it's more of a side card and even if you do manage to use it's effect the best you might get in some situations is 1 draw (true, it makes a difference, but there are better cards.) I would run veiler over that thing.

Question - why one of each normal? Watt Dragon and Luster. Running more then one can help in case something happens to them. Although they'd be dead almost half the time, it's an idea.

with so many card cars and maxx c, i recommend threatening roars. to avoid otk. works with many meta decks nowadays. my fav card right now.