kraken doesn't accept sepa instant transfer.. only normal sepa transfer.. are you really sure that the other 2 accept instant?
Why do you have a problem with normal sepa transfer? If you initiate a transfer on Kraken in the evening, it's usually in your bank account the next day after 3 p.m. Which is pretty quick.
because with instant i can move money in 2 minutes from my bank account to the exchanger, that is really better than 24h of kraken.. if i see a good opportunity i want to get in instantly. Of course i don't want to leave money on an exchanger for more than few hours