I would do 1 amp for mids and 1 amp for tweets unbridged on the tweet side. My reasoning is you'll be able to keep the gain allot lower on the tweets and you'll have less noise. For me my tweeters have a tiny hiss when my volume is at 0. I only hear it if I get close to the tweeters but if my gain was where my midbass gain is it would probably be worse.