I will probably be giving the default Eligius difficulty a bump soon. Pretty much anything that sits at 128 difficulty is pointless to run these days anyway. Might take it to 1024 for a minimum difficulty.
But the above is correct, there is no way to custom set a difficulty. This is also not necessary with proper hardware and software. The pool chooses the appropriate difficulty.
Stock S4s have difficulty with lower starting difficulties.
M
I stand by my previous statement. Good hardware and software properly handle vardiff.
Eligius counts the accepted shares it gets. If your setup isn't sending them or finding them properly.... that's not Eligius's fault.
Sometimes pool sode kludges can be implemented to work around or baby these broken miners, but there is so much nonsense out there these days....