The problem with your synchronized: The idea is nice, but it would be only usefull if you any kind of such a buff in use. Would be something in the way need leadership and summoner to unlock.
Not sure about what you mean with the second one: If your summon has no armor and gets knockdown, would you get knocked down too or would your armor prevent the summon to get knocked down?
Plenty of talents are semi-situational. Again, more positive aura buffs are needed to make truly a useful talent, but yes, with current skills you'd basically need leadership to make it worthwhile. Perhaps it could even require both leadership and summoning to unlock.
I dunno about the second one either. Probably the negative statuses would not bypass armor, but it might need to bypass armor to be balanced. Probably a crap concept if it requires breaking the armor rules though. Could work better as a skill, too.
