Ancient FreeBSD update path

[Andrea Brancatelli]

Hello guys. 

I have a couple of ancient FreeBSD install that I have to bring into
this century (read either 10.4 or 11.1) :-) 

I'm talking about a FreeBSD 8.0-RELEASE-p4 and a couple of FreeBSD
9.3-RELEASE-p53. 

What upgrade strategy would you suggest? 

Direct jump into the future (8 -> 11)? Progressive steps (8 -> 9 -> 10
-> 11)? Boiling water on the HDs? :-) 

Thanks, any suggestion in more than welcome.

-- 

Andrea Brancatelli