Yes everthing work no mather with shard you on. Primer, soulstone, you name it. You can event bring your pet.
98% of ppl, get an ATL shield and Main shard.
As for asian shard, something they receive items custom for them. If you have been receiving gift, look at the one you want to bring back.
I use mine to play with friend that are on other shard.
Also, each shield can hold 10 token.