welcome to the forums!
3pt rear blade + 3pt box blade + TNT (top n tilt) for 3pt hitch + some sort of quick hitch for 3pt
TNT = replacing top link and a side link of the 3pt hitch with a hydraulic cylinder. so you can adjust from seat on the fly of how the 3pt hitch implement is adjusted.
box blades generally have some sort of "ripper / scarficer" teeth built into them, so you can raise / lower. the rippers can be nice going through hard compacted dirt, to bust it up. so you can come back and use other equipment on the dirt. either moving it or smooth out ruts and like.
note: you may need to modify your 3pt hitch equipment for some 3pt quick hitch setups. (it is just one of them things, and not everything will line up). telescopic lower lift arms, pat's easy hitch, there are upside down U shapes, to triangle quick hitches. all have there con's and pro's
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i question use of a 6 way blade. there are snow plow style blades for FEL (front end loaders) but sounds like are wanting more of a bull dozer style 6 way blade. in which case... i would most likely want a subframe that ran from attachment point in front... all the way back to the rear end of the tractor. so ya not busting tractor in half, between engine / transmission, and transmission / rear end. having a backhoe, i would assume you already have a sub-frame for the backhoe. that most likely extends off the FEL frame work, and goes all the way to the back.
i would be a bit un-easy with a snow plow blade mounted on FEL. the way you are talking about. as in using like a dozer blade, and running through tree stumps even small ones, to catching rocks and other things under the dirt. and no real way to use a "trip like function" you might find on a snow plow blade. were when it hits something the blade will angle up and out of the way (for example). end result you may bend / twist the FEL arms. granted folks have ran snow plow blades on FEL arms for ages, and if memory serves no one had an issue. but more along the lines of trying to pry something up with just using the very left or very right side of the bucket, is when folks have bent/ twisted there FEL arms.
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i would say go with 3pt hitch implements. with a TNT and quick hitch. from rear blade, box blade, to a york rake, to running a rotatory cutter, to other. a TNT can make life easier and quicker with a variety of tasks.