Honestly I thought implementation was covered in OP. Its a ff:t-esque way of unlocking. You want to unlock dark knight you level the base weapon specializations to obtain certain spells and abilities. Once the title is unlocked you equip it as your ttitle starting at the lowest tier, still leveling your chosen weapon spec but at the same time the exp counts towards your title gaining tiers, when your title does advance to the next tier you do (this is just me, not sure if its in the OP) a type of class quest when the quest is over you advance to the next tier and will be able to chose your title bonuses using a sphere grid type system of progression that will allow you to customize your titles play style (paladin for instance being DD, tanking, buffing/healing...just an example). Now as for grouping and stat distribution you would group based on your weapon spec but gain small stat bonuses from your title based on your weapon spec. The combinations are very varied so please go back earlier in the thread to find examples.