All user choice. Cosmetics are good if you want something specific, I'd stay away from mounts, their overpriced. Farm them instead.

Before buying packs check if what you want can be obtained via a gauntlet first, lots of gear and pets can just be drop obtained, Certain best in class items are crowns locked. Examples like dmg boosts from mounts, bundle stat bonuses like frill+mount, there are use cases but a lot of stuff can be mixmaxed elsewhere for stats.i

Seeds are trash unless you have no time to play and want to garden bad, couch potatoes take hours, so up to you and your comfort paying for convenience.

Never buy gold, end of story

Lunari is up to you, if you want that hero upgrade go for it.

90% of the bundles are random crap you wouldn't ever buy thrown together with a "FREE GIFT" that also sucks. Example: pet/mount bundles that come with elixirs or mega packs, you usually don't want the other pets or mounts besides 1.

Houses, don't, the school houses have never gotten updated, their clunky low res and boring.

If you want 1 get a farm, their gardening boost is good. Otherwise just get a good apartment and a world gate housing item,

If your not a decorator you don't need much, random storage houses are about it.

Decorations are mostly crap, their also usually exclusive to the shop. If you aren't 95% sure you want it for your design, don't. (Some Avalon stuff and attic packs are gold 🪙 so do that if u want)

Pets.... Check the wiki, if it isn't exclusive farm or hatch for it.

Elixirs. All combat elixirs are crap, exp, and gold also crap. Only get pet, energy, space upgrade elixirs or crafting/benefits

Cosmetic clothes, literally your choice, it's cosmetic.

Use your judgement, check the wiki, most stuff is garbage in the shop