wait for the upcoming leyline event where theres a bonus x2 drop for the first 3 leyline daily.

you're in luck(?), wednesday onwards there is an event that gives double the reward for leylines (limited to 3 claims per day)

as you are already AR45, there isnt really much reason to keep the fragile resins. You can just spend in on all the resources you need. I would prioritize mora & artifact over EXP. since after ascending at 60 to get the 2nd talent, levels doesn't give you much gains after that.

- Yea you can spend some of the condensed resins on Ley Lines if you lack of Mora/EXP book. You already unlocked the highest reward tier at World Level 6 so getting more Mora/EXP from it will never be a waste. But better reserve maybe around 20 units for future contents, just in case future events have some crazy rewards and can benefit from resin refills.
- Also, expeditions can go for 3x Mora, 15k a day, total 450k per month.
- Abyss 300k each reset, total 600k per month. Normal progression should net you around 200k/mth.
- If you have extra time to play the game everyday, google 'genshin daily artifact farms'. Then recycle those low level artifacts for some quick mora. After you reached the needed amount of Mora then stop recycling them and feed them to your gold artifacts.

Your original concern was if its worth spending your resin stocks on exp/mora, youre limited to 3 CONDENSED resin storage, so im assuming you meant FRAGILE resin. Its pretty much up to you  how you feel you should spend resin on your own acc progressions.

If you feel you lack mora/exp for talent upgrade and couldnt wait, go for it. If you feel youre stuck on artifact choices, go for it. Hoarding it pretty much restricts your gameplay. You can pretty much spend half of your stockpile as others had said, and keep half for emergency, like event or something, and you'd still gain a significant progress on unit progression side.

with the new BP update, you get a small amount of fragiles for free too.

Personally if i feel like im getting bored with my progresssion, i either try new stuff or take a break from the game really. No point burning yourself out on a game.

Yea normal 20 resin claim only if we are going by what they showed during the live, condensed is not used. Since most of your characters are there, then all the more reason to spend the resin on mora leylines then balance some with artifacts, and maybe talent books / weapon materials too if you need them.

Extra mora you can also try this out if you have not been doing it already https://www.youtube.com/watch?v=jUpLGcO2c90