vaping does have a learning curve and sometimes takes quite a bit of experimenting with juice flavors, pg/vg/nic ratios and delivery devices / toppers to find what works best for each individual.
Heavy or chain vaping and the tiny bits of wicking material in most if not all pre made clearo heads really don't go together well.
Thick & sweet liquids make wicking issues more pronounced by gunking up the coil & wick faster, sweet flavors also burn easier.
Might be your delivery devices / toppers aren't suitable for what you're looking for.
Could be your juice is too thick to wick in your current toppers as fast as you'd like to vape.
You shouldn't
have to fiddle with V or W all the time, it should be more of a fine tuning bump here or there, which leads back to finding a delivery device that suits your vaping style.
I prefer carto tanks over any other delivery device because they fit what Im looking for from a vape and my lifestyle best.
But, just like the tons of recommendations you'll receive about various other delivery devices you won't know if they are what works best for you until you try them.
Vaping is all about personal preferences, experimenting with variables to find the combo(s) that work best for you is normal, unfortunately that does take buying stuff until you find what you like.