Seeking Successful Tools for Multi-Channel Campaign Enrichments

Hey all -- building some new things and would love to know what enrichments you all find the most success with 1 - Phone #s in US - what tools have you found to give the most reliable mobile # data? 2 - Combining Linkedin with Email. I've always run Linkedin or Email separately. What's the best multi-channel tool to have an omnichannel campaign? Would this need to be somehow custom built with a LI tool and an Email too, and Clay? I know Expandi, our LI automation tool offers the option to email prospects within a seuqence but I don't know how good it is as it's not their core focus. Lemlist? LAgrowth?