Well, personally I tweaked the common burst style a bit, and it works wonders for me. Here's the basic seed of it without usage of items, E>Q>W>R>ignite, now sometimes I gotta do a different combination for different situations or if the mid starts to learn the pattern of my burst. This burst looks wrong and etc. but it's more strong than you think, it's fast and the thing with using your R last is that if the enemies start coming at you and your target is very low, you can pop it thus killing the target most likely and escaping without an issue a lot of times. Now for those of you who use the E>W>R>Q combo and etc. live with it! I'm feeling nice and I'll tell you my other basic combos I personally use:
W>E>Q>R>Ignite (Use this if your opponent is avoiding you by a distance and you mange to land your W, your E range I think is longer than your W. Catch them off guard a bit.)
Q>E>W>R>ignite>
(This is my more close combat burst combo in case of I have to go head to head auto range, and yes it works!)
R>E>W>Q (I use this for more chasing or gap closing situations, just know if your
isn't up, you're at risk of getting ambushed by an enemy after you kill your target, so judge wisely, I also use this most commonly in team fights.)
E>W>auto>R>Q>Ignite>auto (My more powerful burst, I use this first at the beginning when I get to 6 so I can either make them recall or die, if they die, I start mixing up my burst combos so I become less predictable.)
>R>E>auto>W>Q>
>ignite (I'm getting into my more advanced bursts as you can see, but I use this for a more faster gap closer)
>E>auto>Q>
>W>R (My prime burst method I use today, it's fast and I can escape if I need to at the end)
I DO have more, but I've said enough, hope these helped and these are my OWN styles. Try experimenting and create your own personal burst.
P.S Don't judge these! As I said these are my OWN styes I use, they fit me and I like them!