Ditto before you say something I'm sure you'll say ("AK got blocked by love, that's different and Sauron doesn't get it") I'll say this:

We know:
1) HP magic has been blocked
therefore it can be blocked

2) Love is one of the things that can block it

This does not mean that love is the only thing tat can block it.

Also your argument about semi-accurate spell naming is rather weak. Yes the jelly spells make your legs/whatever like jelly, but not actually real jelly. So fiendfyre has the effects of fire but isn't actually real fire? Fair enough as real fire doesn't form into animals and chase you. However, it still burns you. "Turning things to soot and ash" is better known, to most of us anyway, as "burning." I'm perfectly OK with ff doing it 100 times faster. 100 times faster than 0 is still 0 as burning does not effect Sauron. Please, just accept it. Fiendfyre can still be used on orcs.

Oh that reminds me, orcs are physically stronger than Death Eaters and probably faster runners as well as more experienced warriors. That's the weakest of Sauron's forced and just off the top of my head so Voldy's forces are not better in every way than Sauron's forces.