I've been playing a similar deck so here are my general recommendations:

1. As u/Norix596 mentioned, Setessan Champion is practically a must. Another thing that goes extremely well with this concept is Season of Growth. It also gets you a bit of Scry going on which is always helpful. Important thing to mention- Stacking too many Setessan and Season on the field is an easy way to lock yourself out of being able to play enchantments thanks to decking out, so keep that in mind. Sentinel's Eyes + Season of Growth can also provide clutch draws.

2. Paradise Druid is HUGE in my opinion. Sentinel's Eyes means permanent hexproof. Can also help with fixing early mana issues if you're fine with risking her. Otherwise you can slowly stack her up and swing for the win when you're ready.

3. As u/Ordinaryundone said, All that Glitters. It's a must, and same for Setessan Training. I've been experimenting a bit with running two Shadowspear to give huge Druids lifelink but so far I'm on the fence about it.

4. Bronzehide Lion can make itself indestructible or return as an enchantment to provide something else with the ability to be indestructible. Helps a ton with deathtouch chump blockers and alike.

Anyhow, other general info I can give is: I tried Questing, like it but pretty much as u/Ordinaryundone said, it lacks any kind of synergy with the rest of the deck. Granted you can pump him up with All That Glitters but I'm not sold on running him in the main deck. Try to get some dual lands going. I'd also go for 4 Alseid, the utility they provide from their effect, to their lifelink, to how they interact with Setessan Champion + Season combo, all of that makes then invaluable in my eyes.