Witchblade version of this build also struggles. Witchblade, Level 100 (GD 1.1.9.7) - Grim Dawn Build Calculator
Hardly does SR 85. IEE mods can be buffed to equalize the performance with WB since RA Warlock with Arcane Force isn’t that good either. Or maybe Horns of Korvaak gets an %Elemental damage mod on IEE. Lifesteal also another common problem with Cadence builds since basic attack leech very little without %100 WPS. Getting DR is another problem that prevents build from doing higher shards. But yes Battlemage in general should get more building options. Not just elemental but aether and physical parts can be improved(not Spellscourge which is in quite good place).
Examples;
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S&B Aether Blitz Battlemage, Level 100 (GD 1.1.9.7) - Grim Dawn Build Calculator
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DW Aetherscorched Physical Battlemage Battlemage, Level 100 (GD 1.1.9.7) - Grim Dawn Build Calculator
Ofc both are capable of campaign and SR 65-66 reliably. Physical one also can do 75-76 without much problems but Death Knight or even Warlord with Warborn set does much better damagewise.