that's why i asked what version
ecsro's skill cap is the old isro's of the 70 cap which makes bowers kinda useless, only one good antidevil and the strongbow takes way too long to pull off.
if it's other updated versions of sro with the new skills, bowers are mainly crit based there, since all useful skills have crit increase (antidevil/strongbow), so a hybrid wouldn't be a good idea then since it lowers the dmg of crits (especially a very hybrid bow like 70:70), although the balances above wouldn't affect that much and increase overall dmg.
note: of course this is preference. i played a full str bower at 80 cap and i raped! so i'm gonna side with pure str!

crits
glaive chains are fun to have so why not!

you won't be using them in pvp at all but in pve it's kinda boring to spam all the same skill again and again!
i would:
ecsro as it is now -> str glaiver
other updated versions -> str bower