Hi, u need 5 st for 15 hex (what is max determinated with st) and each perk of hh gives 3 hex to trow, so, max trow with 2 hh perks is 21 and with st5, u dont need st6, i have one build and i made it crit build, so i take crit perks instand of hh perks,cos i think in rt fight itc not so important if u r at 15 hex or 18, and i take higher luck of course because of crit build..