If you pick 10 in Archer, 10 in Warfare and 4 in Ranged. You will deal the same damage as 10 Archer 10 Ranged 4 Warfare, but you don't have any condition for it.
As i know Archer is additive
so 4 in Ranged is beter then 10 in Archer
Best way is to go 10 ranged + 10 warfare + 4 archer
but even with just warfare and ranged we have some
funny issues
Base dmg - 100
10 warfare (50% dmg)
4 Ranged (20% dmg from Highground)
= 150 base dmg and 150*1.2 =180 from highground
4 warfare (20% dmg)
10 Ranged (50% dmg from Highground)
= 120 base dmg and 120*1.5 =180 from highground
7 warfare (35% dmg)
7 Ranged (35% dmg from Highground)
= 135 base dmg and 135*1.35 =182.25 from highground
14 warfare (70% dmg)
0 Ranged (0% dmg from Highground)
= 170 base dmg and 170*1 =170 from highground
0 warfare (0% dmg)
14 Ranged (70% dmg from Highground)
= 100 base dmg and 100*1.7 =170 from highground
So the answer is - if u want to increase ur overall dmg by 50% (100% - for lone wolf) - pick Ranged even for mages
P.S. with all possible ingame multipliers lone wolf for exemple
will deal 5000 crit and 10000 crit from highground