I use an 8 inch extenison with a swiel on the end then the 19 mm spark plug socket. kinda go straight down beside the fuel rail and let it enter the spark plug at a small angle..the swiel takes care of the odd angle plug hole. Works a like a champ
I always just break them loose with the socket then use 3/8 inch fuel line to unscrew them and restart them. Then torque to spec, using the ext and swiel. also coat with anti seize.