Dear Billy:
I like using a sinking line. And yeah a shot makes things interesting, that's why they wear broadbrimmed hats.
I think the speed of the current is the biggest consideration for selecting the rate of sink of the line. Some brands of line provide a rate of sink on the box. The truth is, the one that you select for your conditions will tell you if you need a faster sink rate or not. Take your best guess.
Having said that, I realize that conditions change, every time I go fishing. Usually the line that I have seems to get me to the bottom in the currents that I face. And, yes, I do work depths like you, cause I've been hung up in 15 feet in a gentle flow.
Weight is used if needed, but it's lead wire or really tiny split shot. I add it to the leader knots. This eases the problem of the backcast dropping down. I got a handful of something called lead wool. Plumbers use it for packing and soldering joints. With this I can adapt somewhat, if the current is a bit fast. Not much weight and not all the time.
Anything that I tie for going deep is given a mono weedguard. I can't control the depth that well, and the depth changes with the drift, so sometimes the fly, and line also, is really on the bottom hard!
Summer time stream flow is usually gentle, compared to springtime, so the deeper holes are reachable.
Woodbutcher