This is a tricky one to answer. Sense of smell is different for everyone. What we perceive as a weak scent throw may be perceived as super strong by someone else.
What I can tell you is that we test our Wax in 4 different Warmers.
18 Watt YC Warmer
20 Watt Glade Warmer
24 Watt Hot Plate Warmer
and a Tealight Warmer
The sweet spot seems to be the 18W YC and the 20W Glade Warmer across the board for longevity.
The 24W and Tealight Warmers both give strong throw faster but longevity can be an issue if that's what you're looking for.
We test our scents to throw for at least 8 hrs in all Warmers.