When I first started I used high speed continuous for everything, but I realized that I basically ended up with many extra 'duplicate' images to delete and the machine gun noise also startled some people. I switched to continuous/medium and now I rarely have to wait for the buffer, even in RAW+jpeg (I mostly keep bursts under 3 seconds though, so this might be different in your case). Take a look at how many of your bursts shots are keepers and you may be happier using a slower continuous speed since it decreases that black screen time. If things start moving fast and you need the high speed to catch the exact moment (like a quick dance or bouquet toss) you can switch back and forth pretty easily.
---------- Post added 07-11-16 at 04:17 PM ----------
Originally posted by Zafar Iqbal ...all of it very very important and hectic but I never used continious shooting...
Oops! Just noticed that part on re-reading.
If you weren't doing much continuous shooting and you had issues with the buffer filling you may want to try some faster cards. I rarely have issues with buffer lag when I'm not in burst mode, so you may have either slow cards or a very quick trigger finger.
Based on some advice I was given when I started out I learned was that my pictures get better when I take less pictures and try to anticipate moments. Planning my shots more gives me more keepers, even though I take less shots overall. People took great images in film days when they had to cock the shutter between each exposure, so I know it's possible, and working like this helps me improve my technique and see things better in my mind before I press the shutter. (Also saves on time culling the images after!)
---------- Post added 07-11-16 at 04:22 PM ----------
Heh... I guess I should have read even farther back before posting. I didn't realized you were writing in dual card mode; now it all makes more sense.