When replacing (just the) head gaskets, I'm not even sure I've removed the lifters in the past. So reusing them is a no-brainer.
If you have bent pushrods, it's definitely possible you have one or more bent valves. If you've confirmed, beyond a doubt, that none of the valves are bent, I would reuse the lifters with a full new set of pushrods.
Did I read correctly this is twice, now, the timing chain has jumped on this engine? Do what you can to prevent this from happening again. If the valves are true, you may have dodged a bullet. But doing so twice on the same engine? This is lucky, indeed, and I would be buying lottery tickets, because the gods are favoring you.