The bases on offer are negotiable and the more popular ones such as those you mention would be difficult to get straight away. You can expect around €5500 average net per month except in Italy where you can expect 800-1000 extra, so somewhere around €6500 or even more depending how many Italian domestic sectors you do.
However, my understanding is for non-rated DECs you don't pay for the type rating up front but pay it monthly out of your salary for 5 years. Total cost is approximately €20,000 so I guess a deduction of around €300-400 can be expected.