Lots of trial and error when I do it. I tried doing the first oscillator, which is what I’d start with if I were doing the whole thing. Usually I’d start with ICs but there are none here, I started with the transistors. At first I put them next to each other horizontally but then realized the full circuit would end up very wide that way so I put one above the other. The strip between will be the ground the emitters connect to, and I put those jumpers in:
Next the components nearest those, C2 and C3. It’s tempting to try to make them (rotationally) symmetric but again you end up making it too wide that way, so one goes above the other:
Then connect each to the opposite transistor’s base. I also put in R2 and R3, which connect to a common strip at the top.
I decided it’d be convenient to have a ground strip at the top too so I put a jumper in for that.
Then I could add C1.
And finally R1 connecting to the upper ground, the common strip with the resistors, and the collector of Q1.
Hopefully no mistakes there! Having done that it might be possible to just replicate that arrangement for the other two oscillators to the right, and then at the far right put in the output stage. Probably I’d make a trace cut on the center ground strip (as well as almost all the other strips of course, except the top ground and the strip below that) and use that same strip for the emitters of the next two transistors, then another strip cut, then connect the next two transistors and R12, R13, C9 to that. Connecting one stage to the next might turn out to have pifalls, I don’t know, but if that works out it’d be nice not to have to re-think the layout of each oscillator.