I've said this before, but it's not going to happen.
Back on FTB, there was a way to move spawners. It too had a huge cost. However, I still did it, and eventually got
this. That's 16 mob spawners in one place. It took 4 grinders to deal with it, even though a single one can clear tens of mobs a second. It did make lots of mobs, and it did cause lots of lag, and I'd avoid doing it again now. People would set these up on VC, AFK by them for hours, and crash the server with the insane number of mobs.
I've got a dual blaze farm over at
/warp v-eldrinblaze. It's a public one for all gold VIPs, although it may have broken at some point in an update. It has before, and I can't remember if I fixed it again or not. If not, give me a shout on here and I'll give you perms on it to fix it up. Or I'll tell some other staff to, as I won't be here for 2 weeks. Just don't ruin the aesthetic of it, and don't break the spawners, or I'll just roll it back. If you like, you can add a crusher mechanism to it, and make use of the new sword thing that hits all the mobs, rather than using potions.