Yeah that's absolute crap. I don't see the point. I play with my mate, he uses Eldar and I use my puppies too. We agreed to play armies with a 2nd level
HQ choice, like a rune priest opposed to a named character. So when we say 1000 I wait for him to get his list done, once I see the Avatar of Khaine, on comes my Wolf Lord, designed to shut it down.
Best bet. Change up the missile launchers to maybe 3 las cannons and 2 bolters cause it is big bug, if its infantry. 3 bolters and 2 las cannons. They will restrict his armor saves for the tyrant, yeah he has invul but still it 3+ to hit and 2+ to wound. can't go wrong. then use the
HB on like anything that you can get in range with

Gotta love split fire.
Good luck. Let us know how you go