Tip for safest way to deal with Dreadnode + Brainjack combo ?

[CianaIezuborn]

3. Also, on another question about Dreadnode. I usually only barely get enough hate they need just in the last sec before I got completely Brainjack, is this normal?

When dreadnode pop, it is usually proceed like this :
Atk buff -> Shield lob -> Shield lob -> Halon -> fast blade -> connect -> Halon (finisher right just before I turn to BJ.).
This sequence usually get enough hate for them to kill Dreadnode just fine, but sometimes if I were little slower by only 1 sec, then I will turn on BJ before combo finish. (Halon last hit), and that would make Dreadnode lose its hate before die, and turn to wipe PT. I feel that this is little too tight/sensitive, so I want to ask for any better way.

I watch the aggro meters on the dreadnaught while brain jacked and let dps know in voice chat if they are to high, usually happens with our monk unless I get a perfect grab. He just switches back to Avatar and the rest of the dps finishes the dread.