You can get the most damage when you reach it without the Impale Support. Most important is to reach nearly 100% chance to impale on hit. When my calculation are right you can reach depending on investment reach about 70 to 96% MORE damage. Impale is a strong mechanic in 3.7 and it is totally worth it. Outmatched and Outlast would help with endurance and frenzy charges while mapping. Violent Retaliation / Outmatched and Outlast: Violent Retaliation would gives more block and damage. When you pick this one up your spell block rate will be equal to your attack block chance. Versatile Combatant: this the one node which makes block gladiator so powerful. Painforged: gives some nice block chance and increased damage Arena Challenger: gives the build so much clear speed and dps and works great with the sand & blood skills.