I've never played with tachyon, but I hate, hate, hate, hate blaze/bandit. I've successfully completed a couple of splices with the stuff, but I don't think I'll ever WANT to mess around with it again. I think I've been trying to bury too much (I've been using the measurements from the Toss vids) but after all the trouble I've had with it, I just haven't had the heart to try again with the shorter buries I've gleaned from manufacturer's instructions.
I've made my peace with 16 stand. I bury in three phases like on the Toss vid...once to get that maximum diameter sunk in good, twice to get it almost all the way to the portion containing the core, and finishing with a wire fid to get it through the core stuffed area. The wire fid I use is a wire fid I got from wesspur and twisted around an old 'biner. I used to get cover hung up with a core yarn or two occasionally on that last bury, but I've got a system that works for me now. I've found that the secret (or at least it was the final little trick that I needed to get consistent with this splice) is to make certain that all of the core yarns are all equally tight before you go for that last bury. If one of them is looser than the others, you can bet that I'll manage to snag it with the cover during that last bury.
I've also got an extra long "arborist" length toss wand, but I use it only very rarely. The small get's a lot of use when I'm messing around with OP, ice tail, and 16 strand. I'm about to make new whoopie/loopie slings so it'll probably see some use then, but then again, in that application, it's sort of overkill......I may end up trying to sell it and get a micro sized wand. I can see that getting WAY more use than the extra long.
Edited to make it read better and add more details about my preferred way to make 16 strand splice.