@Kalroth its nice to get some information  from people much closer to the source....

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Stratum: the server gives the client templates that the client can use to generate its own work. Only the block header and first transaction (generation transaction) are included. Stratum uses the least bandwidth of all the protocols. Stratum also makes it very fast and efficient to switch to new work data when there is a block change, which can help keep down the reject ratio caused by stale work. Unlike the other protocols it is not HTTP, so it won't work over an HTTP proxy. There is no real specification. There is a document that explains the core features and for the rest you have to read the source code for "stratum mining proxy".

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so where you get your information the stratum server gives the parameter to the client....and especially the clevermining server will do so ?

I'am confused..... because the default settings as i mentioned before are so much worser then the hints and tipps i found round the world