From the wiki
Shield Champion: While shield is equipped: +2 attack, +2 damage, +5% doublestrike, +1(W) to your shield, an additional +5% (total 20%) Combat Style bonus to Melee Attack Speed, and shield bash stuns 5% of the time DC (10 + 1/2 Character lvl + strength modifier + stun bonus)
My question is, in the other vanguard enhancements(i.e Stunning Shield and Shield Rush) they use the highest ability modifier, so does Shield Champion also do this or is this correct as stated on the wiki?