I would suggest to wait until developer revamp the valiants. But if you really need high dps ASAP, go for Freya berserker.
OR
Wait until your next 10x gem summoning to see whether luck give you vincent or sven. If not, feel free to raise your freya up.
Arrrgh I now have Sven from daily quest and confused because I have more champion freya, drake, and Sven get him lately. I mad not change my point for heirloom set champion only have 1 and 1 more set not get vanity

what should I build sven, drake or freya ?
But I grateful for get him

and feel depressed his faith was hera, only hope to get crit
This is my squad now:
Faye HD, Ronan RM, Talissa warlock, Zedd warlock, freya dragoon, *4 drake, talissa, Nadia, *3 freya, theia, leon, cybella, sven