Adventure only works well when you start with Loci or Unexpected Dai. A more traditional aroma deck normally starts with Aromage Jasmine, Evil Thorn, Predaplant Orphys Scorpio or maybe even Rikka Petal, which would end up activating their normal summon, and that generally doesn't work with Adventure. So there's no advantage in playing more cards since that only means getting Loci less often, and you should drop the Adventure engine if Loci isn't your main starter.

The full combo searches Laurel, Angelica, Rose Girl, Snowdrop and Lonefire. Laurel is always first (although that's searched with Mardel), then Angelica, because they're necessary to gain LP. The other three are more or less equal. If you get disrupted (or if you're forced to use Snowdrop early) you might end up having to search Rose Fairy instead of Lonefire, because she summons herself when searched and she's also level 3.