My buddy uses a 15 model Havoc squad w/4 lascannon and mark of Stinky. I know what your thinking...expensive! My thoughts too, but psychologically a funny thing happens during a game, while you hunt for easier targets to kill, that non trendy Havoc unit is tareing stuff up! 4 Lascannons sitting still w/lots of bolters shifting around protecting the unit's flanks is effective. God does this unit get a high % of explosions. Grrr.
My 1st test to crack this nut was a non-jump-pack blood angel assault squad in a rhino. Just to distract the Havoc's fire and shut them up with hth. The rhino got exploded. I didn't mind, he should have fired at a better target. Knowing adjustments would be made, I needed to stay ahead of this. Jump-packs can assault sooner, but my buddy is a Lash of Submission addict, so...you see where that is going.
My solution. A 10 man tactical squad w/heavy bolter, flamer and serg w/power sword, B pistol; joined by 2 Librarian (double force, neither is the warlord) both w/force sword, bolt pistol, The Avenger and Gate of Infinity mounted in a drop-pod.
The drop-pod comes in auto 1st turn. It can be placed very aggro because of the built in gear. The 6" disembarkation lets you get in to good positions. Snap fire the Heavy B, roll 15 bolt shots, place flamer template and hopefully...successfully cast both The Avenger powers. Havoc squad can be very, very dead!
Now, your unit is in a isolated position. They may not survive, but, what plans your opp had, just went up in smoke. Everytime they look at the table, all they can see is your unit in their zone. Vanilla marines have Combat Tactics, use it!
1st chance you get one of the libbies can use Gate of Infinity to extract this unit from certain death. 415pts. + it is very fun!
My question is this: Can both Librarians use there Gate of Infinity at the begining of the same turn? Making two 24" teleports with the same squad!