If i had to answer it'd be possibly hgh but more likely igf lr3 as its way more promising, if you do run this tho please for god sakes have reta and mitocondrial support like mots-c or ss31
But running it without anabolics is giga low roi and not worth it, you need to stop thinking about things as peptides, because the word is a chemical class not a biological one so its not horribly relevant, start instead think about things in terms of their effects because many peptides have nothing in common in practise so the clustering is misleading
Test will be a lot better, theyre not mutually exclusive but if youd have to pick as test will give way more muscle and is pretty straight forward and also gives amazing mental effects unless youre running ridiculous dosages