First of all, great job! I follow welcoming and found a few real gems thanks to it.
As to the questions: I would keep the resteems low (between 10 and 15) and spread the upvotes wider onto more posts. The resteemed posts are getting more attention anyways and therefore more upvotes. Giving more people upvotes increases the chances of them staying on steemit :)
Bin heute auf englisch unterwegs, damit möglichst viele meinen Kommentar verstehen und antworten können :D
I would also keep upvotes high, to continue to encourage users to stay on the platform, but a lower resteem makes the validity of such posts more credible :)
What is wider for you? Like 10-15 resteems + 10-15 upvotes additionally?
I would say rather 10 than 15 resteems, and up to 20 upvotes more. More would stretch the votes too much.