Your Everfrost can easily let you land your E, with Horizon Focus the turrets will do an additional 15% damage because both a root and stun are Immobilizing effects. Combining this with Cheap Shot which deals True damage after damaging an immobilized enemy. Rylais and Demonic both proc off turrets, both burning and slowing them. Voidstaff==damage. CDR boots for Ability haste and Item haste

This is currently a work in progress, as I continue to test it, it allows Heimer to better teamfight by giving him more CC, and the extra Ability Haste allows faster turrets to get down in moving teamfights. You tend to do less damage without Liandry's but in turn all of your damage becomes burst from your Everfrost--> E Combo, which allows turrets to get off 2 beam shots and normal turret shots.