1250 pt Highlander

It's been a long time since I posted on this forum! I was wondering if anyone had recommendations or an idea on how to approach a highlander tournament with GK at 1250 pts. 'Highlander' refers to all units are unique (no duplicates of any squads) with the exception of troops (max of 2).

My local store just had a tournament and it seemed pretty fun. The format caters to new players and prevents cheesing. It also reduces time spend playing the games. The tournament consisted of 4 rounds that started at 10 and ended at around 6 (with a lunch break in between of course).

I would appreciate any comments or recommendations. I haven't played 40k in forever and need to dust off my models! Thanks!