I am in the process of maxing th9 and currently at 28/26 for Heroes. (40/110/100 for level 8/9/10 walls)
The 14th of January 2015,
I had 3 days left on the upgrade from TH8.
I've been starting up a Hero level upgrade ever 6 days for months and "the big update" hasn't changed that.
I haven't been in a competitive war clan since May 2015, as I have been prioritizing Hero upgrades.
Somebody said, that it would take 14 months to max out TH9 completely and that's what I've been aiming at.
The 14 month estimate for TH9 is pretty much dead on, for me, but I suppose that it's possible to do in 6-7 months (without gemming time) if both heroes can be kept upgrading constantly and all builders and lab is kept busy too ..
For me, the last 6 months have been "zero to one hero play" .. worth it, if you don't really want to participate in Clan Wars much ..
I'm looking forward to 30/30 in another 6 weeks and I woun't be going to TH10 straight away .. going to practice war a bit I think ..
/Affront