How to get a collection of items in rikenby all together? run out of testnet ETHs rapidly

Hi, i am sure there must be a way to do a collection in the one go, but hav'ent found it yet. Meanwhile, doing my drafts one by one and run out of testnet ETHS...when trying to get them from anothet faucet even compatible with rinkeby, have to wait hours till they are usable. Anybody knows what to do? big thanks