#3
One tip I can think of:

I barre the 14 fret more or less through the whole solo with my pointing finger. I use my other fingers to hammer on the other notes.

e|:|----
B|:|-14-
G|:|-14-
D|:|-14-
A|:|----
E|:|----
     ^^ barre using pointing finger

e|:|--------
B|:|-14-h15-
G|:|-14-----
D|:|-14-h16-
A|:|--------
E|:|--------
         ^^ hammer these notes using middle (top note) and ring (bottom note) finger
 


The rest is down to practice
#4
Yeah what he said about using your pointing finger, barre the 14s then just the other notes with your second and third finger...umm practise the runs in it while barring the 14..listen to it a few times to get the feel of it... most of this solo is scratch chords and the vibe.