Would you recommend Valerian for an Army?

I am in the middle of constructing a new list for custodes that includes typical stuff like Trajann, a Blade Champion, a mix of Guard and Wardens, but I've come to a roadblock when it comes to figuring out a leader for my last squad. I am torn between trying for a second Blade Champion to have the squad rush to the mid-field, but I realized that Valerian is a tiny bit cheaper and also has his own upsides. He makes the squad tankier with his AP reduction and adds some damage with his own rerolls, but I am wondering if that justifies replacing the Blade Champion's advance and charge. Any suggestions on this?