Your shot pattern all depends on the river you are fishing. For the most part it's bigger to smaller (Unless you're fishing fast flows and you want to bulk shot right about your leader)...
Steelhead aren't fussy, biggest mistake I see new guys make (And I did when I started) was running their rigs way too shallow and using far to big a float and too much weight.. All you're doing with a rig like that is smashing your roebag/bead whatever into the bottom and dragging it around.. That's not a very natural presentation.. I like to run a longer leader then most 36in+ with a 4-5gr float in slower flows... and if I need a few dust shot on it, then so be it..
If you aren't getting bit on your first 6 drifts, change something.. Making the same drift over and over again without changing up if you aren't getting bit is silly.