For the rear I'd say Eagle claw. For the front Try-all sticky. Of course you could use something else for the front like Mojo, but i prefer wider tyres for trials.
Currently running on hs33 + echo cylinders + echo lever blade + phat pads, now bleed with blood was thinking about going back to water bleed. No booster and armed cross over by the way.
I think there are other ways to strengthen your muscles (cheaper also). Trials is not all about muscle power, it's more about technique and stamina. So personally i wouldn't bother buying such a vest.
Booster doesn't really improve the braking itself, you probably won't notice better grip or hold of the brakes. But booster saves the frame and bolts from flexing while braking. Probably betterfeeling when pressing the lever - stifer, stronger.