I played a ork tank rush army yesterday. I was able to surround and pop two trucks with tank bustas with 2 units of six reavers. Needless to say they were fire magnets immediately after. I've been running 3 groups of 6 or 2 of nine with good results.
Has anyone ever deep struck a unit of 12 4 caltrops 4 lances with archon, shadow field and grenade? Drop, pop heat lances, jets bike move behind the archon. Let him tanks shots with field t4 (or 5 with drug luck.) then cluster caltrop you next turn ( or hit and run if assaulted the rinse and repeat. I haven't yet but I sounds kind of fun.