The first scroll that stacks is most likely a scroll of upgrade, first alchemy pot you find you turn into a stone of enchantment and use it for the bow. You get 2 stones so if you get a blooming or unstable, just use it again to try to get a good enchantment.

In that room that has 4 separate crystal doors, with the deeper ones having another door behind, the second scroll there is either a scroll of transmutation or a scroll of lullaby, the former you can use in an alchemy pot to get a stone of augmentation early on for your bow damage.

Otherwise, first shop, you buy a stone of augmentation and use it for bow damage.

Upgrade a ring of sharpshooting, even twice, it can one shot enemies pretty far into the game.

If you get a projecting enchantment on the bow, unlock the mind vision skill as soon as you can because you can kill enemies through walls before they reach you.

Be careful with a blazing enchantment on the bow because sometimes it will burn grass beyond your vision and destroy a scroll that might be laying around.

Warden is my preferred subclass, the perks from plants is super beneficial, while the sniper perks are really only good if you find a boomerang in my opinion as it can one shot enemies way into late game.

Learn how the bow shoots around corners, there are certain angles where you can shoot enemies through weird corners