the 2nd mix is better than the first, but the third,..your reverb is almost like a fast delay also...and tends to throw the timing off even more. I don't nec. feel that doubling is always the answer, but it sure works to thicken things up. Van Halen never needed to double up his stuff, nor any of most of the other guitar greats...mainly because their playing and tone stood on their own. The guitar sound is very mid-rangy sounding to begin with, and isn't a nice smoooothe tone that is really pleasing, imo. Kinda like if SRV decided to wail some power chords with his lead sound...and this is more a lead sound your guitar player has, but he's bashing some power triads instead. Additionally, I don't really hear much of what the bass is contributing, tending to make things even more mid-rangy sounding. Boosting the suggested frequencies seemed to help round out the guitar a little bit, but if you could take a step backwards, and work on the guitar tone to begin with, I think you'd find mixing a lot easier. Maybe try some MILD chorus on the guitar, and spread it out stereo...in an attempt to mimic a 2nd guitar. It might also just make the overall guitar sound a little more pleasing to. The drum timing is another issue.