FSP's and press HS drills

How can I write my routine to press handstand? I train FSP's too.

For example:

Back lever

Front lever

and Press HS drills

or

press HS drills

back lever

front lever ?

How many drills should I do for press HS? 1 ex., 2 ex., more?

You'll probably want to do press HS drills with your HS work. So work on obtaining a good handstand and L-sit first. After you get a good handstand, you can start working on box presses. There are a few essays floating around, I think.