1. double the track, move one track at 12ms, pan opposite, check perceived volume
2. double the track, pitch one track at 0,02%, pan opposite, check perceived volume
3. double the track, cut and move/replace the "equal" parts in patterns. Its literally like double tracking.
I kinda do that but I'll add one more thing and process the guitars differently. Usually record through a DI and have an amp mic'd and have a clean signal going into the interface. Depending on the song I'll leave one dry or add different effects to it so it sounds like 2 completely different guitars.
That presonus tip seems pretty hot. Def gonna try that.