The equation of the KotBS and Choosen by rebalance tactics Destined for Victory and Runefang.

[Arena]

Since the Chosen's tactic (morale gainer) activates only by the block and therefore only works in defense, I propose to make Runefang (240 str+WS+init from parry) as triggered only by the block too and replace the buff of strength for toughness. Thus it turns out that both classes will have unique protective tactics, acting only on themselves and working only with a shield. Changing the strength for toughness will make it for protection (shield spec) instead of offencive, because for the protection the toughness will be more useful, in conjunction with the weapon skill (increasing parry) and initiative.
Or you may change choosen's tactic Destined for Victory to activate by parry, so it can be triggered with great weapon, and will be mached KotBS's Runefang, which now can be used in both defensive and offensive specs.

[Penril]

Declining for not following the format.