Ignite damage with eye of reen seems VERY low

A single melee hit of mine did about 2k. I was able to obtain a little over 60 stacks of Reens Ire which has a duration of 5 seconds. Ignite chance was around 300%. increased fire damage over time was around 300% (i was doing it for the lols). After spam hitting I should have had a ton of ignite damage yet it was ticking for less than 2k to start and went down quickly for the last few ticks.