Ple-Sen
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Ment, decapitation will only happen once per battle and might not even trigger. A different build is needed here. The battering ram is also used with heavy armor and requires the skill to wear it, so it's also out.
Added 8 minutes later
In general, Uran, if you want to rely on the "God of Death" and have an effective combat character, you should take the one-handed weapon branch. And ideally, also either be a follower of Ormhild (+2 melee attacks from the skill and ignoring enemy parrying with the passive from worship) or learn the "Fanaticism" style from the "Paladin" talent branch. But this will require some creativity in terms of backstory (although, an Assar worshipping Ninsharra is also not a common sight).
Added 8 minutes later
In general, Uran, if you want to rely on the "God of Death" and have an effective combat character, you should take the one-handed weapon branch. And ideally, also either be a follower of Ormhild (+2 melee attacks from the skill and ignoring enemy parrying with the passive from worship) or learn the "Fanaticism" style from the "Paladin" talent branch. But this will require some creativity in terms of backstory (although, an Assar worshipping Ninsharra is also not a common sight).