Re: How are you using your electronic call??
I use a Wildfire as well. I usually start with lightening jack or some kind of prey distress on medium volume for a couple min, off for a min. Then I repeat on 2/3 volume, wait a little longer, then a couple barks/howls, wait a bit, then I blast pup distress or dying coyote for the rest of the set, 15-20 min total. If I'm in wide open areas I'll go a little longer.
A lot depends on where I'm calling, and what time of year, etc. Yotes should be pairing up and getting freaky time of year, so I use more vocalizations in hopes they'll come looking to kick the intruder out of their turf. In a month or so, I use more pup distress.
If you're hunting areas that get a lot of pressure, throw this all out the window until spring when you'll have a new crop of uneducated youngsters running around. In these areas where they've been hunted a lot, or those close to farms, houses, etc, something unusual (that they don't associate with armed dudes in camo) might work better ie-kitten distress, k9 pup distress, coon fight, whatever they haven't heard a zillion times.
I like things that go "bang"... I love things that go "BOOM!"