Not sure about others, but I'm basically never using Valks for their UP generation expect during the Subjugation map. I use it as more of a poor man's princess to tank out magic hits. Having this unit around would've made many lich maps a lot easier if you didn't already have a princess. As pointed out, 40 sec is a long time to have stats that high on a gold lvl deployment so I'll be using her as another MR tank and probably replaces Elaine and/or Kerry on most deployments. I probably wouldn't be as stoked if I already had Clissa or Thetis and 3 MR tanks even for the cheap cost.