We are training for "Self-Defense" and do MMA as SPP, so keep that in mind...
I have always used a (Progressive part) whole-part-Whole Method.
Basically after our Top Secret Warm-Up, we Drill & Spar. There are a few Formats and each Athlete will change it up from Day to Day depending on what needs to be addressed.
A typical Cycle:
Review drill of Previous Prescription Drill (from last workout)-Spar-New Prescription Drill.
So, in Sparring, the Athlete gets Feedback on what needs to be strengthened, fixed, or addressed, creates or uses an existant Drill to address the "Issue", just ONE. On the NEXT Workout he will warm-up with the very SAME Drill he did after Sparring in the previous Workout to keep it fresh.
Typically, the Workout will have 3 Cycles of these....Free Movement, Clinch, Groundfighting, followed by one 5+ minute round of MMA.
Example:
Tuesday:
F.M.:
1) Review from Monday: Getting Crossed when Jabbing
#2) Free-Movement Sparring (Intensity up to Partner)
#3) Create/Use Drill to Address new "Problem": Had trouble landing leg Kick.
Go to Clinch...repeat, go to Ground, rinse...repeat.
Finish w/ 5+ Minute Round of MMA.
Some days to switch it up, an Athlete may do a few Drills of one Range, Spar that one Range then finish w/ the 10-15 Minutes of MMA to REALLY focus on one aspect.
Other Days, it's no Drills, just 3 Segments of Isolated Sparring in the 3 Ranges and Finish w/ MMA to focus on "Competition/Toughness". Some Days JUST Drilling, some Days JUST MMA. Depends, on what that particular Athlete feels needs to be worked on.
After that we finish w/ our "Street/Off-Road/Self-Defense", then Cooldown.
No matter what it is pretty much Sparring from beginning to end. Everyone mixes and matches the Gear and Intensity as needed, so there is no excuse IMO to not have sparring in every Workout.
"Do you ever use the Vale Tudo gloves? "
Pretty much all the Time, because everything is "mixed" and it's near impossible to grab, submit, & wrestle with Pillows on your hands. When the Guys want to bang or isolate FM, in particular Striking, they will either put on some good Headgear or THEN use the Pillows, but after you go fingerless it's hard to go back to Pillows.
We do NOT isolate Striking from Grappling from Wrestling in the 3:00 BJJ Class, 4:00 Kickboxing Class and 5:00 Wrestling Class Format. In fact, It has been Years since I "purely" Sub Wrestled or Boxed.
In Free-Movement there is always the threat of a Shot, Tackle, getting your Kick caught. In the Clinch there is ALWAYS Fibbing, on the Ground there is always G&P. So the fingerless are almost a necessity.
The only exceptions are with spastic Newbies. If someone is anxious or nervous and has zero control, they get the Pillows.
Some thoughts...