I have never used cialis with levitra but have used cialis with viagra. For me, viagra can kick in 15 minutes strong while cialis doesn't and don't really feel the effect till the next day. Viagra by itself will provide good results for 12 hours + . So the two make a good combination. Just reduce the amounts of each little.
cialis takes at least 6 hours to kick in for me......i take it right before going to sleep friday night (actually 2 am saturday morning) if i plan on "needing it" for sat or sun.
I prefer cialis and viagra together. I've tried running cialis, viagra and levitra, but I found it to be too much. Overall, Cialis alone should do the trick.