I found my nipples would not budge and would've rounded off with an open ended spanner/12 sided ring spanner.
I put a 6 sided 11mm iirc (197 brembos) socket on them and was surprised at the amount of force I could apply... I think I need new nipples all round lol.
Passenger rear, driver rear, passenger front, driver front.
If you have brembos with two nipples per caliper, bleed the outer nipple first.