Both are worth consideration, but Flower Cardian Willow takes the cake by far
D/D Necro Slime Type Effect Monster Attribute DARK Typing Fiend Level/Rank 1 ATK 300 DEF 300 Archetype D/D Typings Effect TCG Date 2015-11-05 OCG Date 2015-07-18 Card Text If this card is in your Graveyard: You can Fusion Summon 1 "D/D/D" Fusion Monster from your Extra Deck, by banishing Fusion Materials listed on it from your Graveyard, including this card
Argothian Enchantress I prefer [c]Argothian Enchantress[/c] over Eidolon of Blossoms because of its lower mana cost and its shroud ability, making it much harder for your opponents to remove
Using stall strategies is completely legal, and there's technically nothing wrong with it, but it does result in a long, drawn-out game with very little action
I have used this many times and it has worked better for me than when I was testing out MagneRock, even with my lack of Azelf