Positioning of a Plate

[cons0410]

Hey Guys, i wanna print this plate picture attached. And i have the following problem: I wanna print it with the least amount of supports because i have to print atleast 140 of them. And they need to fit in a tight space and i wanna keep post porcessing to a minimum. But when i place them like in the Screenshot if have those visible lines as you can see on the picture. Do you have any recommandations to fix this?