I have Bucas blankets & they provide their own temperature ranges for the different turnouts - FP has a very dense coat (even clipped) & I find he remains comfortable without applying that 10 degree clipped-horse modifier to the temp guidelines; remember that horses are better equipped to deal with cold than with over-heating.
I have the Rambo Duo...so my blankets are the same as yours.
This is how I blanket my guy, he does go out 24/7 and is clipped however (live in VA):
65-55 lightweight sheet (summer one)
55-45 100g turnout
45-35 100g turnout w/ 200g liner
35-25 100g turnout w/ 300g liner
25 and below 100g turnout w/400g liner
That is how mine is blanketed, however all depends on climiate and weather. Everyone does it differently!