My life-drawing journey is characterised by constant evolutionary steps.

Yes! 'Paths are made by walking'.
I have experimented with, and added to my current palette, tinted charcoal. Ages ago I used tinted charcoal pencils but didn't find them exciting enough. They come in a range of 'quiet' colours and you can move the marks around with a tissue or a finger. Chunky blocks of tinted charcoal are different. They allow you to apply across the paper a swathe of pigment which can be caressed with a tissue or the finger. A tissue tends to pick up the charcoal granuals and leave a lighter deposit whereas the finger seems to press the granuals into the texture of the paper and results in a darker outcome. Both are appropriate.  Whichever one uses the result has something of an appearance of a water colour wash. I find the greatest value to be in the transparency of this material. Earlier pencil marks can still be seen. And another advantage is that one can draw in pencil/graphite on the surface. As a material and a techique I find tinted charcoal amazingly liberating.
Below are two drawings in which I have utilised tinted charcoal blocks. The first, posted earlier, is from Paul Fowler's 'extreme poses' in Stroud on April 14th with the model Natalie. The second is from Angela Palmer's Tuesday class on April 19th with the model Liv. My reconstruction of the deconstructed pose has at times in the past resulted in a strange morphist result in which I have felt the parts need to have some help in giving them an identity. Using the colour to help differentiate each part is a new step. I like what is happening!