Hey Keith,
I follow the general rule of 60% to 70% attribute/skill development skills and 30% to 40% sparring or sparring-oriented engagements.
If I had one hour a week to train (60 minutes), then I would spend 16 minutes in sparring at 2-minute rounds. This will give you five to six rounds of sparring depending on how frequent your breaks. I would do 2 rounds of hand-sparring and 2 to 3 rounds of full sparring without grappling and 1 round of anything goes. This would be low to moderate intensity with moderate resistence.
I might be additional rounds of sparring with low intensity and low or moderate resistence to work specific skills and attributes.
As far as particular exercises go...
(a) Work defences against attacks to the hand, head and leg where your opponent feeds an attack and you keep largo mono and strike the stick. Do a few rounds with little movement and then move into sparring like movement. Key is keeping distance. Work the 1-to-1 ratio and then try to do a 1-to-2 -- for every shot of his you get off 2 includes including the hand hit. This is a basic abecedario (alphabet) approach with one feeder and one receiver.
(b) Work "defanging the snake" against various angles. Looking at the striking asterisks - 1,2,3,4 and 9 are primary angles. Work these at different heights. For example, most hand hits come at a low angle 3 or 4 so work those. With them as abecedario first (as above) and then do a sumbrada off of them. He feeds a 1 to the head and I counter with a 1 to the hand or wrist. I then feed a 2 and he counters with a smash to my hand or wrist with an angle 2. You can work in order of progression or mix the order. You can also focus on particular angles and targets. Distance, precision in strikes, line familiarization - all come into play. Start off with low intensity and low resistence and slowly build up the ladder.
Every so often I will add an extra energy in this one where you grab the stick (which happens) and start smashing the hand! Lots of fun!
I would spend 20 to 30 minutes just on the above given limited time and then another 10 or 16 minutes on sparring. These still leaves you some time to work on new material. As advice, work on one thing for a week to a month and then move on if you think you have got it.
For example, work the charge with an roof block into the clinch for the "fang choke" or a major outer reap to a "fang choke". Work that as a basic pattern with low resistence and intensity and then build it up. Eventually you start incorporating it into sparring and drills (a) and (b).
These drill work for both stick, knife and sword!
Hope this helps!
I think this week we are going to focus on weapon work after writing the above! Mmmmm...smash head with stick

Cheers,
Bryan