Here's an idea for dropping some points:
1) You've got 20 grots (60 points) and 2 runtherds (20 points).
Why not take 19 grots and only have to pay for 1 runtherd?
80 pts - > 67 points.
2)
30x Sluggas
-Nob
-PK
-BP
Are these mobs 30 boyz + a nob? The most you can actually take is 29 boyz + 1 nob or 30 boyz and no nob. You have to upgrade 1 of the 30 to be a nob.
That should save you 36 more points!
That gives you 49 points saved = 24 points under-budget. I suggest some big shootas for those shoota boyz mobs.