
Existing hero attributes can be modifed
(1) use some hex editor like HxD
(2) search for the hero by name
! with Unicode encoding, since each letter takes up to 2 bytes

(3) after the FF FF FF FF FF FF FF FF 00 00 00 00 00 00
03 00 00 00 attack
04 00 00 00 defense
05 00 00 00 initiative
06 00 00 00 movement
07 00 00 00 spotting
08 00 00 00 range
I have just used ascending numbers to demonstrate which relative hex position relates to which attribute
(4) at deployment phase the hero exists twice, I had to modify both ocurrences

ok, now that wasnt necessary but it is somewhat hilarious ... max. positive value seems to be FF FF FF 7A
hint: how to get findings on hex stuff: I use VBinDiff.exe to compare a savegame before and after some specific action like getting a hero
Why to do this?
I dont know
Maybe to turn the spotting artillery hero to a modest a+1