I've been told when fishing chromies with a long leader / indicator to just go with straight mono, as the need for a proper cast and turnover isn't as important. Is this something you'd recommend? How would you taper a very long leader ?
No need to bother with tapering much, the fly is going to sink and pull the leader straight anyways...who cares how it lands.
Fishing chironomid, attach maybe 3' of 30lb butt to the tip of your floating line. Attach a section of 8lbs leader (I use Maxima Ultragreen) to the butt with a triple surgeons knot. To the end of the leader, attach 4' of fluorocarbon tippet (Seaguar fluoro has high knot strength, which is a weak point with several other brands of fluoro), I normally use 4x (around 6lbs). If you're fishing a weighted pattern in water deeper than 10' or an unweighted pattern under 10', add several micro split shot to the leader near the connection to the tippet.
When no hatch is happening at the surface, a stationary chironomid about 1' off the bottom works well. To achieve this presentation, use an indicator placed on the leaders, near the connection to the butt. During a hatch, retrieve your chironomid slowing maybe 1' per second- basically just fast enough to keep the line straight and not looking like this ~~~~~ on the surface. When you're retrieving slow, there isn't really a need for an indicator, you'll feel the bite during the retrieve.
Using split shot, your leader hangs pretty straight up and down, so make your leader the depth of the water less a foot. Alter the length of the 8lbs Maxima UG to achieve the depth. You can experiment with depth by repositioning the indicator on the leader, but it casts best with the indicator near the butt.