I guess it depends on whether you think Rosemary is good enough to run. If you do, run Junk Synchron. Otherwise, don't run Aromaseraphy Rosemary.
There really isn't another option Tuner-wise. Aromages vary far too much Level-wise to rely on a card like Unknown Synchron or Sunny Pixie unless you specifically build around it with cards like World Carrotweight Champion, which is worse than Junk.
I just dont get why people get so 🔥 at the gamea guys when they are just trying to build a consistent deck to bring out that new aromage synchro monster
...A card isn't necessarily better in a deck just because it's part of the archetype.
A lot of the time, Armades is going to be more useful than Rosemary. And there is zero argument for not running both if you're running either in this deck.