Working on a few of the problematic spells - namely the ones whose targetting if soley based off of Hit Points. Let me know what you think of the revision to Color Spray (replace the relavent HP targeting sections with the text below):
*Creatures within a 15 foot cone originating from you must make an Intelligence saving throw if their current Life is 8 or lower, or become Blinded.
At Higher Levels: At 2nd level and above, increase the maximum Life that can be affected by 2 for each level above 1st.
It fits the style of the spell, mainly hitting low HP/Life targets. Having it require a save removes the need for rolling to see how many are affected, and upping the maximum Life lets you target more potent creatures.
Also, does anyone know where I can find the Dazed condition? I'm 98% certain I've seen one for 5e, and it would be very helpful for Sleep and Power Word Stun.