Seems a simple question,but the answers probably more complex.
The fact that you have experience in the game should help.
A lot will depend on how you like to play the game,and how much time you have to spend playing.
Are you going to
Play as a single player?
Join a Clan?
Spend real money?
Jump to another kingdom,or stay where you end up, which is likely to be more competetive?
I can tell you that I have a new account, it was started late JUNE and its presently Hero level 42,and purposefully I havent been paying much attention to it.I havent even progressed to palace 5,though I could easily do so.
So you ought to be able to do much much better than this.
However, sometimes moving slowly can have other benefits.There are ways to build and research that saves you time in the long term.
I just re read your post.
I only bought the one pack.(not the novice pack), so I could get auto complete on all tasks.