Well, Gertrud is a good card, 6/6 stop bonus, that's pretty hot.
but stop ability is very important, and La Junta has two good options for stop ability. Bryan, and Tank. Bryan, with a bonus is 7/7 stop ability, 4 star. Tank with a bonus is 6/5 Stop ability, 3 star.
Yayoi, is 7/6 stop ability, 4 star... plus -2 damage min 1 from bonus.
do you use My collection Pro? or just make decisions based on standard "My Collection" interface?
My collection Pro,
you can see many different clans at once, just by scrolling to their location, rather than navigating page to page. you can sort them by Power, Damage, Ability, Bonus, Name, Rarity, or number contained within your collection. unfortunately, there is still no Cr mode that just allows you to view Cr cards...
also, all doubles are stacked into a single line, so you don't have to worry when you get to a page that contains 8 commons(a problem i seem to have a lot) My collection Pro is also easier to add and remove cards from your deck, and you can put decks together without altering your current deck.
Basically, My collection Pro is an Awesome addition to Urban Rivals... Rock On.
give it a try, it's really improved the game for me.