I do mention the duality of RAS activation (vascoconstriction, cardiac hypertrophy, and fibrosis, despite water and electrolyte balance, connective tissue cell growth, and the connective tissue metabolism & tissue repair): it's a double-edged sword. But if you can share some study showing this "10x more damaging to the heart than straight testosterone?" Is it this study by chance? D’Ascenzo, S., Millimaggi, D., Di Massimo, C., Saccani-Jotti, G., Botrè, F., Carta, G., … Dolo, V. (2007). Detrimental effects of anabolic steroids on human endothelial cells. Toxicology Letters, 169(2), 129–136. doi:10.1016/j.toxlet.2006.12.008
With respect to erectile issues and "deca dick," consider testosterone as it is the anabolic agent you'd want to use for preserving (and augmenting) sexual function.