I couldn't find a comparable run mino run with a qotf wander that was significantly faster. It's very hard to beat damage while moving.
Fun is certainly an aspect, if someone wants to play ignite prolif for the fun of spreading fire, then sure. I'm trying to figure what does ignite prolif offers that better than any other? For example, does tectonic slam mechanically do anything better than sunder? Play either one you want based on aesthetics or feels, but a lot of players will pick a skill based on which is better, so ignite prolif should offer something better.
If you're playing a cone-based skill like fireball or burning arrow, the prolif range is going to be approximately equal to kinetic blast's explosion radius(plus kb's explosions are cast a bit away from the target), so KB will cover the same area as the prolif. Tornado Shot ignite prolif is the only build I can think that gets better coverage than a non-prolif build.