The issue is that the floor of the card (when its only making three or four mana) is still way too high, because Dockside is a card that can be looped, reanimated, flickered or cloned to such a degree that simply making an extra treasure or two is still enough to win the game
If youre more of a combo player, you could build a deck with both Walking-Heliod and Rosie, Ashnods, Animation Module and stock the list with all the artifact tutors you can find
Giott, King of the Dwarves Rarity: Uncommon TYPE: Legendary Creature SUBTYPE: Dwarf Noble CMC: 2 Mana cost: USD: $0.74 EUR: 0.51 TIX: 0.12 EDHREC RANK: 14952 (1/1) Double strike Whenever Giott or another Dwarf you control enters and whenever an Equipment you control enters, you may discard a card
Rather than flying, give your attackers abilities like protection, menace, or trample and play creatures that already have them
MTG Draft Guide Rules, Strategy + Tips to Win
Neither way works to push your creature's triggers (whatever they may be), so they really only work in ramp-esque builds, which limits their usefulness