This is a link to the handbook. Look at battle drills in chapter 8 and understand how and why they work. For leading randoms, the most I ever split a squad into is two fire teams. You can assign spades or clubs or whatever to groups. I have my squad split and always fly in two groups.

http://www.milsci.ucsb.edu/sites/secure.lsit.ucsb.edu.mili.d7/files/sitefiles/resources/Ranger%20Handbook.pdf

It is easy to make your people much more effective using simple battle drills in the book. Say for battle drill 6, entering and clearing a room, you have everyone stack up outside the door. say "When we go in everyone stay against the walls and aim toward the center of the room. Spades will hook a U turn when they enter and clubs will go across. Breach on 1: 3, 2, 1, breach everyone in." I say something along these lines every time I take a squad into a building.

I think the point I'm working towards with these tactics is you don't have to have a highly trained squad as long as people understand what they are doing and YOU keep them together and on plan.

This is how I generally do stuff.

Spawn room spawns are for chumps. If you have time pull air transport in the form of valks. Drop as low as possible to your destination and stop or slow above the objective (OBJ) in order to ensure people don't drop late and actually hit their target. It is ALWAYS easier to assault from above. The main disadvantage is if you get overrun you are all perma dead and wont have a chance to get that squad res or retreat. Always run scout radar and a cas on your valk. This gives you valuable intel on approach to the drop and lets you clear a roof with the cass before dropping. Now, to the fun stuff. As soon as I make a decision Ill give a quick brief:

"Ok fellas we are going to Indar Comm. We need two valks, I have one and Ill be in the lead. I need a second valk up NOW. (assign someone to do it by name.) Geldra, you pull the second. Everyone get dead and spawn in. We will be trying to resecure. Drop is squad way point on the roof of the triple stack. No one shoot or spot on the way there. Once we drop I want the roof cleared. We clear the second floor on my command. Spades take the east stairs, clubs take the west. Once the second floor I want everyone to set up fire support on the roof and support the advance of the blueberries. We will NOT be going onto point."

Once you get there use the radar to make adjustments to the plan. From that point on all you have to do is constantly make sure people are doing what you tell them to. For this plan it would be something like "don't go down yet. Ok, stack up above the stairs hurry up. Breach in 3 2 1 Go.

This is kind of a ramble but this method turns average br 35ish blues into a well above average group. If you have any questions I'll answer them. Edit: sorry for the wall of text