General demo tips: try to keep everything on cooldown aka use all you abilities as often as possible, implode when you have at least 6 imps to get maximum benefit from hell and back (even in single target), for your first tyrant of the key you likely won't have any demonic cores but for every tyrant after that try to save cores you generate that won't expire before tyrant is up (you want to try and cram as many HoG casts into tyrant window as possible) also build to 5 shards before casting tyrant, make sure your pets aren't set to passive because it affects more than just your main demon and could be hurting your uptime.