a little ice and a dash of evian or mountain valley(check bottling date for freshness, less than 4-5 months is best), IMO. No need to play games with your bodies facilities.
anywhere between 60-70 proof is good for me to start at, as the taste buds die I will up the mix 75-80-85-90 as well go, to get that taste back, I dont want a big blast of flavor but a true long term taste palatte. if you start strong you can never revive it. years in the dungeon I guess and I hate to bruise my knees going to the john these days