NO not 10s for the general body clip. You'll get too close. Try 8s and see if those match what you get with your big clippers.
Or, I should say, this is how I do it and get a good match. Monster Clipmasters for the "flat prairie" expanses of body and small clippers with 8s for the nooks and crannies. I alternate between pairs and sections so that horse and equipment all stay happy.
You can clip with 10s or any other blade if it's the only one you'll use. But your mistakes will be more obvious with a close-cutting (higher number) blade. The wide "harvester"-like blade you'd put on your little clippers will make them work hard and get hot. Your clip job could take a while with just the one set. (Ask me how I know and why I'm still friends with the chick who asked me to help her clip her horse this way....)
I have never seen an 8 blade-but now I will be on the lookout. I use the 10 wide clip on blades on my A-5's and the 10 regular for the head and legs. If I am using my Clipmasters for the big parts, the 10 regular does cut a little closer. When I was shwing arab halter, we would blend the legs with 15 or 30's and do the nose and ears with the 40's -gasp, I know.
It does depend a bit on your climate, discipline (maybe) and what your going for or prefer with your horses.
I'm in CA and would most commonly use these;
10 - for body clipping, fetlocks, general use
30 - for muzzle, bridle paths
T84 for touch ups on body clips - about a month after body clip if they need
to be touched up for a show or something
A wide 10 will be handy for body clipping, so I would get that if you plan on doing that frequently.
As stated above, a 10 blade should only be used to body clip if you're a quite good clipper. Closer the clip, the more mistakes you will see. That said, the 10 gives a much more show ready and smooth clip than a 7,T84, etc. IMO.
Picked up the Andis AGC Super 2-Speed last year with a regular 10 blade & a wide 10 blade, would not really want to do an entire body clip with the narrower blade - didn't notice the clippers worked much harder with the wide 10 ...
I also body clip with a #7, I think the little bit of extra length looks better. I've also got on hand 10, 15, 30 and 45 (which I've only seen used for clipping around injuries/wounds/stitches by the vet, but for some odd reason it came with my clipper).
I usually clip my Arabian with a 10 blade so I agree with Grataan there. Must be a breed/discipline thing. So true about 2-3 weeks prior, too. I generally want my horse clipped shorter and then let it grow out a bit (incase of unsightly lines) and then they will really shine in the 2 weeks before the show!
I use a 7F to body clip with. I think a 10 takes them too short.
A 40 is for muzzles, ears and bridle paths (basicly shaving them)
I use a 10 for legs, tails, trimming face hair (or use a 7F for that).