Have you already experimented with the compounds you have planned?
Implementing a SARM with the three compounds listed above is pissing on cotton for the most part; adding a SARM to a good AAS cycle won't make any noise. Save your money and spend it on quality food here.
Ideally you will want to adhere to a GHRP/GHRH combination for a long period of time due to the nature of the compounds and from most users experience regarding observable effects from GHRPs and GHRHs.
Also, if you are one that dislikes frequent injections, precise timing when it comes to meals and injections, etc. Then GHRP/GHRH combinations will likely piss you off and provide annoyance rather than actual progression in your goals.
You may notice acute effects upon initiation, such as water retention (which should not be a terrible thing as long as body composition is within a good spot, also assuming renal and cardiac function are well) the water retention will aid pumps during resistance training. Other acute effects may include lethargy/fatigue, possible tendon, joint, nerve inflammation, etc.
The cumulative effects after months and months of use are what you are desiring. As with quality GH, your IGF-1 levels increase after prolonged use and that is where you benefit.
If quality growth is not accessible at this time: sure you can go with peptides and all of the new flashy products all too common these days, or, hold-off and keep grinding away with your nutrition, training, and well thought-out AAS use day after day until quality GH becomes accessible.
Are you dieting? focused on developing/gaining, lean body mass accrual? These factors can assist your decision in which GHRP/GHRH combination you go with as some intensify hunger, etc.