I use a water mist bottle to lightly spray or mist the coat before using a pin or slicker brush. this keeps the coat from breaking. The average person will not notice it but this is a left over from my showing. My metro dryer is 20 years old and still going strong they will blow out the loose hair and let you see right down to the skin a great way to spot any problems long before you feel them. Such as cysts etc.
I often brush daily during a shed out. Mostly I will give them a warm bath, after brushing them out, then blow them out. This loosens the hair and I then work the coat for the next few days till they have mostly blown it out. I pull out buckets when I do this and it take some time and patience but hurries the process.
Also slickers are not created equal the back of the slicker should have some give, you should be able to push your thumb down and feel the backing give. If the backing is as hard as a rock I don't bother. They are more likely to scratch or irrate the skin.
Some of my favorites they are not cheap but the last a really long time
The 3c's Dog Show and Grooming Supplies
I have two slickers that are about 10-15 years old now. I buy them from the 3C's when they come thru at the local dog shows. So if you have dog shows in your area go hit one and talk to people there they will tell you the good long lasting brushes to us
Also a good pin brush is fantastic. I like the oblong one tiny picture but I have three of these
The 3c's Dog Show and Grooming Supplies
easy to use comfortable wood handle.
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Boots, Sparkles and Tink Bridge dogs, Tuffy, Blueboy, Pudge, Maddie, Broker, Jet, Baily, and Reva