Legendary robin and lyn

atk+ is pretty good for robin and can become a amazing monster.
robin with atk boon hits 51 atk. summoner support+ ally support puts her at 55atk. if u are someday able to +10 her she hits 59. hone+ 1goad gives her 69. atk3 seal and u hit 72. brazen atk/spd or any atk brazen will put her atk to 79. if not fury or LnD3 can work. can also be further improved with another goad/spur/drive but u get the point. slap chill res on ur teammate and she has a MT of 88. any melee she initiates on will prob die in 1 hit as most melee carry def then res. and any ranged unit will be hit with their lower stat. give vantage 3 on her and works well with brazen. reciprocal aid to get her to vantage range. and u got urself a dragon that can potentially KO everything that tries to touch her. and res smoke will constantly debuff the enemies. most wont be able to double her naturally making it easier to take a hit to hit vantage% only need to be on the lookout for strong bow users/raventomes and falchion/divine naga. that being said as long as u enter vantage, u can KO them before they KO u due to falchion users having low res, raventomes/bow/naga being ranged meaning most the time their def is sheet. oh and the sweep weapons as well as wrathful dazzle combo. but that applies to every unit so yea pretty invincible~
only unit i think can pull this off better is Mgrima due to his retarted atk stats with atk boon. but will be stuck with slow movement