Good leave-in hair conditioner for daily use?

I'm looking for a leave-in conditioner or hair treatment to put in everyday after washing, when I'm not using a stronger bonding treatment like K18. For reference, I have wavy, fine, but thick hair with blonde highlights and my hair gets greasy pretty quick. I'm going to list some products that I know I know I love (Asian beauty and other!):

• Shiseido Tsubaki Premium Repair Hair Mask (gold packaging): I love using a tiny amount as a conditioner (every ~3 washes)
• K18 Peptide Prep Clarifying Detox Shampoo: my favourite shampoo for my scalp (every ~3 washes)
• K18 Leave-In Molecular Repair Hair Mask: my favourite stronger hair treatment (~once a week)
  • I've also had good experiences with Olaplex No. 6 bonding treatment, but I much prefer the K18 one

Things I've tried and didn't love:

• miseenscéne - Perfect Serum (red packaging): decent, but I don't reach for it. I think it makes my hair a bit greasy and I don't see an effect if I use a small amount.
• Shiseido - Fino Premium Touch Penetration Essence Hair Oil: Did absolutely nothing for my hair.
• Olaplex No. 5 (leave in conditioner): doesn't make my hair as soft as No.6 so I wouldn't repurchase.

I'm not sure if this information it helpful because I haven't tried a ton of products, but I'm looking for something that's light enough for everyday use that I can use after a regular hair wash day (when I'm not using a bonding treatment). Ideally something that I can use on wet hair. Any information would be a huge help! I'm trying to make more informed purchases :)