Last war I 3 stared a th5 with my th3 Baby account with an army camp capacity of 40 troops lvl1 and valks in the cc.
You just have to Lure the valkyries out to the edge, soround her with enough archers and than drop a barbarian next to her every 2 seconds. Then destroy the air defense (if it is Standing outside) and drop a cc of 2 lvl6 baloons near the next archer Towers.
Yes they are harder to beat than a pack of wizards, but they are not unbeatable. Also it does not matter if your th4 Players fail, because than your th6 Players can bash the remaining th4 bases.
Also it is not uncommon to meet clan where one Player has mayed valkyries. I would more be afraid from the lvl5 pekkas that are donated by your th8 enemies ;-)




