Yup. And you can attack pretty much any base you choose.
Im at half lavas half Legos and have nothing left to do in my lab, every troop spells and dark troop is done. Heroes at 19/19 and still going.
High heroes are nice, but without high level dark troops, you aren't going to be too successful in war attacks. Mostly all th9 3* attacks involve some sort of dark troops, so having them uograded will never hurt.
Once you hit th10, rethink your upgrade schedule. You're gonna be at th9 for a while uograding stuff that shouldve been started at th8






