I played twenty PvP matches this morning, always taking the three trophy match.
Sixteen had BoneDragon in the enemy team. Wraith was in ten of these.
Three were Naga teams.
One was something else (bunch of green troops, Webspinner, Loyalty etc).
I won all twenty games… but the repetition is such that I don’t really feel like doing more… or will need to go back to a one-troop defence, so the variety preserves my sanity, at the cost of a 30-40% drop in my gold income.
from my point of wiev this week is hard to make a successfull defense of nagas unless someone has fully traited mythic scale guards, so i think thats why there is less naga around
plus the assasin naga perk is kind of leading naturally to use of bone dragon (even if the perk doesnt work not everybody knows or cares to change it after they find out)
i wanna help with the event but not by making a totally looser defense, refusing to ascend scale guard to keep my personal quality of life card sorting leaves me with no good choice at all 
so there i made assasin (with bd lv1) defense then i found out assasin doesnt work so what im suppose to do 