Drum-dials are okay, but you need to learn it by ear. It's not hard. It just takes some practice. Take one of your toms, and play with it. Here's how I do it: Start with just one head loosely installed. Start tightening in small increments around the drum until the wrinkles disappear. Find the lowest natural resonance of the drum (when the head just starts to ring freely and clearly) and make sure the tone is the same at each lug by gently tapping the head with the key about an inch in from the lug. Make small incremental adjustments to get each lug in pitch. Take your time. Then install and tune the other head to the same pitch. Once both heads are in tune with themselves and eachother, you're basically done. From there, you can fine-tune the drum by slightly raising or lowering the resonant heads pitch to your personal taste. You can also tweak your stick rebound and feel by slightly tweaking the batter head. Just make sure each lug is at the same pitch and don't deviate too far from the natural resonant frequency of the drum. You can't make a 10" tom sound like a 14" and have it sound good.
Drum-dials are a handy tool once you know how to tune a drum, but they aren't very useful if you have no clue. They usually come with some generic recommendations, but they suck. Use your ears!