I understand the reluctance to net-deck, believe me, I do. But putting multiples into a deck to increase consistency is just smart deckbuilding, it has nothing to do with net-decking or anything of that sort. So running 1x Daring Skyjek versus 4x is just saying that you don't really want to draw it consistently, which then says, you just don't need the card at all and can drop it. Refusing to net-deck is one thing, but refusing to add card consistency will simply result in your deck failing to perform.
As far as topping the curve off at four, you say that's too slow, but the most aggressive decks out there top out at four. RDW famously topped at four with Hellrider pre-rotation and now runs Fanatic of Mogis. Further, you tell me that topping at four is too slow, but you put a six-drop in the deck? If Aurelia is only for games that go long, put her in the SB as you don't need her most of the time. But more importantly, aggro decks will either win the game by turn 6 or the game is typically lost by then. So a six-drop really doesn't make sense.
For mono-black. Yes, you have first strike, but they have targeted removal... a LOT of it. Their job isn't to win creature combat. As such, Gift of Immortality is never going to resolve as they can take out the target at instant speed. Do you have answers to Desecration Demon? Whip of Erebos? Gray Merchant? As you sit I only see two cards that could deal with one. So unless you're getting a T4 kill every game (which you won't), you have something of a problem.
For mono-blue, Master of Waves has pro-red, so again, your only option at the moment is Chained to the Rocks... strikes me as a bit of a problem.
For R/G devotion, they're going to be dropping a LOT of creatures faster than you can...
So, what can you do about it? Again, I would suggest using one of the tourney decks as A STARTING POINT to then deviate from based on the cards you have and the strategy you would like to adopt. If you're all about double-strike, then get another 3x Fabled Hero, 1x Two-Headed Cerberus, and 3x Fencing Ace. Toss in some Fireshriekers and focus then on some spot removal and pump spells for them. It's not that hard to make the changes, but simply denouncing all the time and work someone else put into the decks you see online just for the sake of "not net-decking" is silly. It is possible to look at someone's idea and figure out how to apply your own ideas to the deck...
A few added thoughts:
1) Chandra's Phoenix, mana permitting, is better than Skyknight Legionnaire 100 out of 100 times. Why? It can come back with a burn spell. Skyknight dies, it's gone. But also, why not run 5x of a 2/2 flying haste? Flying wins a LOT of games.
2) If you're wanting a TON of speed, why are there only two one-drops? Foundry Street Denizen will almost NEVER attack for just one. Soldier of the Pantheon and Dryad Militant are both good options here too - although I cannot stress enough how much Firedrinker Satyr is bad.
3) Again, if you're after speed, where is Burning-Tree Emissary? It's literally a free 2/2 that can help trigger battalion and the like.
4) If you really want an unorthodox way to go with things, figure out how to run a deck with 4x Firemane Avenger. It costs all of a dollar per card and can be a real threat, taking out blockers, pinging the opponent, all while gaining you life.
5) Boros Charm? Your board wipe worries are significantly less if you have 4x of these. Alternately, Rootborn Defenses but that's more expensive and you likely won't get any benefit out of the populate trigger.
6) Temple of Abandon really is worth looking into getting a few copies. The scry can be really big for you.
7) Hammer of Purphoros can also really help a build like this, giving stuff haste and even turning late game land draws into 3/3 golems.
8) Additionally, if you're on the double-strike train, why not up the copies of Madcap Skills to 4x and toss in Dragon Mantles? Both are GREAT for double-strike creatures and the mantle even replaces itself by letting you draw another card. Both open the door to get two-for-one'd, but such is the case with auras.
9) Perhaps Tajic would find a welcome home here? Indestructible is a thing these days I hear...
Ultimately how you decide to modify it is your business, but keep in mind that taking someone else's deck and modifying it is NOT net-decking (taking someone else's decklist card-for-card is). I cannot stress how it pained me to start looking at decklists and such myself, but in the world of competitive magic you will lose a LOT if you refuse to add multiples of cards for consistency or to recognize that some people do this for a living, lucky bastards, and we would be well to at least consider that they might know what they're doing.