I'm debating whether i should rent/buy a hotel area in smp8 (current server) and move to smp9. I am not quite sure. Someone said they found a skele spawner for me on smp9 and i want but i just not sure. I dont wanna abandon the friends i made but... it's so confusing.
Keep your res on smp8. Use smp9 ONLY for using the mob spawner. Thats what i do for my spawners, and i keep my player in town on smp5 because thats my enchanting area. Hope i helped in any way!!
I wouldn't have a res on smp9 if you plan to grind there. If it's hidden at all, it's likely pretty far out. That would make running back and forth to town a big pain.