Originally Posted by
Trystangst
Knowing how other things in this game work (hello Talisman boosts)
It's probably more like:
Base - 100
Level 2 (+5%) - 105
Level 3 (+10%) - 115
Level 4 (+10%) - 125 (for example)
Level 5 (+15%) - 140
Level 6 (+20%) - 160
In other words, the percentages stack (5, 15, 25, 40, 60) but are always based off of the base stat, not additive.
*edit* Tested and confirmed.
Magus Allied Soldier Level 5 Fearless - 4324/4714 vs 5* 80 Warrior Hell Dice/Warrior Soulless Demon
Magus Allied Soldier Level 6 Fearless - 5228/5700 vs 5* 80 Warrior Hell Dice/Warrior Soulless Demon
Unit level and Talisman level/selection the same between the two. No buffs or debuffs. Only thing that changed was Skill up.
Difference is +20%, which is exactly what the Skill up provides.