Hello,
There is a slight distortion.
The synths are much too strong (we could barely hear the drums)
I do not know if you equalize your samples (I am not myself an expert because I am just beginning to understand the settings of an equalizer.)
According to some, the faders of tracks instruments must be set to - 10 to - 12 dB (The reason is simple: the more a style of music is powerful and stronger, he'll have to leave a margin. Here we make music "Club", therefore leaving a margin of 10 to 12 dB is required. This will allow you to have no problem Headroom)
(According to a mastering engineer) Do not use Limiter on the track overall, do not under any circumstances to turn the volume at the end of mixing, this would limit the possibilities terribly at the mastering. Please make sure to calibrate your mixes between -5 and -3 db peak maximum in order to leave room for mastering happens in the best possible conditions.