Rest pause training good for ectomorph?

I'm 45, 6'1".  Want to bulk from 195 to about 215 to compete next summer.  I'm an ectomorph, lean, and struggle to put weight on.  I know, calories!  Question is I'll finish up my 4day split strength program (6 to 10 reps) in two weeks and want to know what to do next.  Next phase in my book Encyclopedia of Bodybuilding by Robert Kennedy is a Rest Pause phase with a 5 day split (1:Chest/abs; 2:Back/calves; 3:Shoulders/upper traps/abs; 4:Quads/glutes/hams; 5:Biceps/triceps/calves; 6:rest; 7:repeat).  Is rest pause right for me?Question:  Is this just too much?  Should I go back to basics:  compound 3x full body, or push/pull/legs which I was doing before this routine, upper/lower?  I want to do a lot of squats because I need to develop legs and want the testosterone boost.  Also would prefer a many-angle chest routine because I did a lot of bench presses in the past and didn't like that women's breasts look on me.  Want to continue to hit uppers, lowers, outers, and inners to create that cleavage.  Emphasis should be on packing on beef now and worry about refining later, right?  Any suggestions?  Thanks!

Rest-pause can be an extremely effective method.  I have to ask, though, why are you following a routine that has you going through all these different phases?  Have any of them worked?  If you were doing something that worked, why did you just move onto a different routine?  That 4-week, 6-week, or whatever other BS rule is out there to tell you how often you have to "switch things up" is just nonsense.  If a routine works for gaining strength and mass, keep at it until it stops working.  Even then, you may just need to just adjust a few things here and there, not switch everything up.

Also, why do you think that rest-pause training requires that you NOT do basic exercises?  Sure, you should not be using the rest-pause method for squats, deadlifts, or heavy presses, but you should still always be doing those movements.  If you're going to use rest-pause, use it for accessory lifts.

Read up on Doggcrapp training if you're interested in this.

Pack on Muscle Quickly and Efficiently!

PL89,
   I'm just following directions.  It says to do Phase 1 (push/pull/legs for 5 weeks), did that, and saw some progress.  Phase 2 (4day split for 4 weeks, doing that, seeing some progress).  I understand if it ain't broke, don't fix it.  I'm assuming the guy knows his stuff, and I'm giving it a try.  The book says that rest pause is "highly regarded for its mass building qualities."  Well that's what I'm going for!  I was just looking for second opinions.  And a sincere thanks for yours!

This also isn't the first book I've read that advocates such a program.  Incledon's Maximum Muscle Plan advocates a 12 week Size (higher rep) program, followed by a 12 week Strength (lower rep) program, ending off with a Combo Size/Strength program.  I did that program for 9 months (3 months each phase) and saw decent results for me.  Another book I read advocates 4 weeks of Hypertrophy (8 to 12 reps), then 4 weeks of Strength (5 to 9 reps), finishing off with 4 weeks of Power (explosive tempo on the concentric phase).  So every book I've read has something similar. 

More details on this rest pause program:

The routines are loaded with compound exercises.  But counter to your advice, the program calls for using the rest pause for squats, deadlifts, and heavy presses.  What are accessory lifts, solation exercises?

My concern is that the program is intense.  It will mean workouts of 90 min. to 2 hours for me.  As an ectomorph I'm not sure it's a good idea to be working out for that long.  I understand shorter and more intense is better for my somatoform.

1st exercise for a body part is 2 sets of 1+1+1+1+1 (the "+" being the rest pause)
2nd ex. is 2 sets of 4+4+4+4+4
3rd 2 sets of 5+...

Some exercises get high rep straignt set treatment:  flyes, crunches, straight arm pulldowns, calf raises.

I'll check into the Doggcrapp training.  Thanks!