doable or do you think need to go to 100 to allow a player who's lagging behind enough chance to catch up? thoughts?

I've seen enough comebacks to say that 100 is where you really want to go, but if both players agree on a lower goal, it's no big deal. You'll be altering the value of certain cards and characters in the game, but as long as you know, you can deal with it.

Thanks for you advice

I'm sure you're right.