For my own wikis -- farmer is fine, except for no practical way to back up.
If AWB or some other mechanism worked with farmer wikis to export all the pages, farmer would be quite sufficient (again, speaking only for myself).
I found that using Special:Export works pretty well to back up the pages of the wiki. It is true that it does not back up your images and certain other things. But it does back up most of the content of your wiki.
To avoid having to go to Special:AllPages, highlight them all, copy and then paste them into Special:Export, I just assigned every content page on my wiki to a category. Then I put in the category and export it all. I even made a link to save me having to type in the category.
The following link:http://everquest.wikkii.net/w/index.php?title=Special:Export&addcat&catname=EverQuest
takes me to the Special:Export page and enters the category name "EverQuest". I usually just check the box "Include templates" and click Export. I also have another link:http://everquest.wikkii.net/w/index.php?title=Special:Export&addcat&catname=Backup
for the Category:Backup, which covers some pages not in category EverQuest.
I do have Advanced Hosting and I am able to use FTP to copy everything for a backup. But I still use the links for quick and easy backup of just the content. It is a waste of time and bandwidth for me to FTP the entire setup every day, when using those links does 99% of what I need.
So I only FTP everything when needed, like when I just upgraded from MediaWiki 1.16.4 to 1.16.5. Or like a monthly back up. The rest of the time I use Special:Export.