I'm new to fantasy. My shop just start a 500 point league. I'm looking at runing

10x blood letters
10x pink horrors
3 x flammers
1 herald or khorne with Aok

not sure if this is a good list don't really know much about fanstasy. i have the deamons from 40k I've read the rules anyone one have any better ideas please let me know and your hero/lord can only be up to 125 points. any advice would be helpful