Ok, noobs. Listen up. Cap of FT from items is 15. AA FT stacks with this. Tribute FT does NOT. FT works at level 1 unless the item has a Required Level. FT does not double a bard's mana regen. They get the SAME bonuses as any other class with a mana pool.
FT of all types can combine. So FT2 mixes with FT2 to get you 4. 15 items of FT 1 will net you 15. Anyone who thinks the same FT can not mix are NOOBS!