Enemy phase team

Is it worth it to make an enemy phase team?
My team:
Ryoma fury/vantage +def/-spd
Xander fury/quick riposte
ephraim triangle/quick riposte +atk/-def
hector vantage +spd/-res
Would it be ok on defense as well as offense?
Any other suggestions for teams are welcome
Other viable 5 stars
lyn +hp/-def
tiki (y) +atk/-spd
ninian +spd/-atk
robin-m +atk/-res
reinhardt +spd/-atk (ugh)
klein +atk/-res
4 star possible: +atk cherche