I think it looks like you have the basics down.
DO NOT blend the 870 and the 895, short and to the point the 870 is made on a ladder scale formula and you could blend 885 with 870 but you should not skip a rung by going from 870 to 895. The potential for runs and popping along with die-back would be great.
Would it work? Yea but could cause you some general headaches or may just be fine but just plain not worth the risk.