1. Use cards on your heroes to get sancs. It goes saint, half-angel, angel, arch-angel, dominion.... The title isn't really that useful itself... it just indicates how many additional bonuses the hero has.
2. Don't do level 2 until you need the spirit the third boss drops. (you can see the rewards before entering the lab). If you still need hopebringer spirits, keep doing level 1 easy and try to hit a score of 700.
3. Guild funds that you get from contributions can be used to level the guild and the technologies. You can find this in the guild manor after opening guild.