Looking for advice

[Rogue]

Hello, Guard players.

I'm hoping you can help me out with a bit of list-building. A couple of friends and I are going to play a mini-league between ourselves, with a couple of 1250 point forces each. I have a small GSC Brood Brothers contingent, and figure I can use it as my second force, but I have very little tabletop experience with Guard since maybe 3rd edition.

Here's what I have.

3 Leman Russ tanks
- all three have magnetised sponsons and hull weapons. Two have magnetised turrets (the standard Russ options, not the demolisher ones); one doesn't - that one is fixed as a battle-cannon.

30 infantry with lasguns

1 officer
2 commissars
1 tech-priest
1 standard bearer
3 grenade launchers
3 mortars

I could also potentially borrow some of my GSC models if there's a good match - my magus could be a primaris psyker, for example - as it would fit the general theme of a Cult-infiltrated Guard regiment.

My plan

1 tank commander
2 Leman Russ tanks
Tech-priest

The officer and both commissars would each lead a unit of 10 guardsmen (Krieg-flavour, because mindless self-sacrifice hits those GSC buttons again).
3 chimeras (that I don't yet have, but could proxy short-term), because having mechanised infantry in support of the tanks makes sense in my head.

That comes to 1215, leaving 35 points spare for juggling or enhancements. I'm thinking either Hammer of the Emperor (because tanks), or Combined Arms (because tanks and infantry).

I'm not aiming for finely-tuned tournament list. Equally, I don't want it to be a complete mess that'll get rolled over in every game.

So, what do you think? Any advice/criticism would be appreciated.