Best Bless

[Cainehill]

Not sure E10 is worth it - too expensive for the huge extra cost. But E9 is great for Arco, perhaps mixed with another bless as well - I like E9 N4, or E9 D4, or N9 E4, key for me is having either a strong E or N bless with them.

[shovah]

the e10 extra point of reinvig is very useful on the mages although yes including n/d is good for heart companions

[WraithLord]

Does the Shroud of the Battle Saint also cut upkeep fees by half, as for blessed units?

[Arralen]

AFAIK, no:
Upkeep is halved for units with the 'holy' (blessable) tag in the unit data. This has nothing to do with actually being blessed (what the shroud does).

Appointing an unit as prophet makes it upkeep-free, though.

[shovah]

which is why its good to prophtise expensive commanders (such as neifel jarls)