I like this paper although, or especially because it doesn´t work particularly nuanced in colour.
The attempt to provoke more colour with strong overexposure and weak developer is not promising.
Nothing changes with the colour, the gradation becomes flat, the grain increases - the print looks muddy.
Therefore one should try to manage on as little light as possible. If values in the light areas are missing, a two bath development is a means to an end. But in this case the strong one (about 1+10) first. As soon as the shadows appear deep black (snatch point), one changes into the second developer. This developer must be a little castrated - to become inured to semichinon - either through addition of " Lith C " (sulfite) or through an excess of "Lith B" (alkali+sulfite), or through addition of another (hard working) developer (like VGT A = HQ with a tiniest pinch of phenidon). Alternatively, also another diluted hard one (e.g. Catechol 1+20 - 1+50) could be used.
1. Lith 1+9 4min
2. Lith A+VGT A + Lith B (15+15+25+1000ml) 2min