Hello there mate,
Sorry i missed couple of updates of yours. Had a bad headache yesterday and didnt do any drawings
btw #53 ; these sketches look good but they are in primitive level. As i mentioned before you should start some anatomy studies since they'll help you a lot drawing the heads realistically.
#57 - i really like the mood portrayed in the first sketch. good job here. Landscape looks cool too.
# 59 - Now this is a great piece. thumbs up! only thing i want to mention here is that silver knob like thing on the shoulder armor has a very strong highlight. its likely that the viewers eyes will go there immediately and then to the riders face due to the red color eyes. if this is intended, then no worries.
Good work mate. Finish the other piece as well. best of luck.