The pressurised bleeders can cause damage to seals, there are no shortcuts but to do things properly, thats one person at the bleed nipple and one on the pedal. Although on my clutch I can reach pedal with my left hand and bleed nipple with right hand that works well but that clutch pedal is hard to push!

same idea but useing car vucum is easyer.

I have another idea that sounds about the same. I want to buy one of those biga$$ syringes that they use to inject cows and big farm animals.Put it on the 500mm hose,connect the other point on the bleed nipple.Loosen the nipple and pull on the syringe to cause a vacuum.This I think will also suck out the fluid and I just have to fill the top with new fluid.

i use a sealed container with two hoses in the top of the container also sealed, one hose 500mm other hose 2-3mt, long enough to reach a vacum line on the motor,short hose on the cracked nippel start car and suck the fluid thru,repeat all wheels, longest to shortest.

But now I am curious. Dodgeman, you explained that After each pump I must hold the pedal at the floor and before releasing the pedal the drain nipple must be tightened and then so on and so on.
But, if I use a clear hose of about 500mm long connected to the nipple it won't be able to suck air back into the system because there will be brakefluid in the hose.
As I understand also is that it sucks only a little bit back from the pipe so the chance of a air bubble being sucked in is very little.
Am I right?
In this case i can just connect the pipe to the nipple,open the nipple and pump the new brake fluid through the system, close the nipple after the new fluid is pumped through the whole system and remove the pipe and bob's your uncle I'm done.

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No not the case a couple of minutes and the fluid is clear. And while its bleeding you can keep on working on other things and top up the fluid as you go....

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LOL, yeah, it'd the clutch that needs the fluid changed. Still, if that's the biggest mistake you ever make in your life Ruben, then you got braggin rights over me.

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for the clutch master cylinder though the longest line and the shortest line are the same line

gravity bleed!!!! that would take forever!!

Or you can gravity bleed the system by opening the bleed nipple and letting ithe fluid drip into a container untill the clean (new) fluid appears, topping up the fluid as needed. when done tighten the nipple and pump the pedal to make sure you have a good pedal, crack the nipple once more and check for any air and then lock off. Top up fluid and your on your way.