ofc level 5 army is viable lol
they have most hp do alot of damage and have high and def rates
you don't have to use heal/stone skinn all the time (unlike level 4 units who need em)
and if we are speaking about enemy having high numbers well who gives a deal? a smart player will always find a way to beat it
and as a side note for people who be wanting to use dragons or any level 5 units
USE orc shaman( their TOTEM heals every round but most importantly THEY HEAL BLACK dragons) (on side note at least they did in KB:ap
)
i gotta go i will go into further details when i'm back home