Enemy gains +1-4 Stack(s) of Soulblaze on Critical Hit, to a maximum of 3-12 Stack(s).
+2.5-4% Bonus Critical Chance on Chained Hit. Stacks 5 times.
Target receives up to 2-8 Stacks of 2.5% Brittleness, scaling with charge time of Secondary Attack. Debuff lasts for 5 seconds and can have a maximum of 16 stacks.
-8.5--5.5% Charge Time on Chained Secondary Attack. Stacks 3 times.
To your allies, you're a slow, moving fortress advancing forward.
To your enemies, you're a kill box that dissolves whatever remains trapped inside.
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Psychic Vampire is the most consistent way to get passive Warp Siphon stacks. If you do have a godroll Illisi with 5% Crit Chance and Shred 4; In Fire Reborn is a viable pick due to the consistency of your flames killing chaff in HISTG. Base Illisi has 8% Crit. Adding the talent tree's 5% + perk 5% + shred's 20% = 38%, over 1/3 probability of landing a crit that ignites enemies. Wildfire and Peril Combustion will literally alter the battlefield.
A case can also be made for Blazing Spirit + Warp Nexus Trauma Staff, but it just helps less if you're trying to support the DoT damage also inflicted by your teammates.