With Ryzens there's not much of overclocking of CPU, because it automatically boosts the most heavily loaded cores high if power budget and temperature allow it.
And having good clock speed memory instead of some cheapest memory has way bigger effect than overclocked CPU:
Ryzen's internal blocks are connected together by data bus called InfinityFabric, which is locked into memory bus speed.
Hence slowest memories would seriously handicap CPU's performance.
3200MHz is what you would want as normal level.
3600MHz is basically optimum by being pretty much 100% sure to be achievable by IF bus of any Ryzen CPU.
And unless just wanting to spend more money than necessary, there's no need for water tubes.
Waterpipes in place of heatpipes don't make heat disappear magically, unlike claimed by marketing hype.
While water's heat capacity can absorpt short load spikes, all that heat has to be dissipated into air.
And most watertube coolers just don't have that much surface area for dissipating heat into air.
Because of that majority of them get beaten in continuous cooling per noise by high end heatpipe coolers, which are more or less lot cheaper.
Beating £43 Scythe Mugen 5 would need beefy radiator.
https://www.overclockers.co.uk/search?sSearch=Mugen+5
And it's basically overkill for just six core Ryzen, for which £21 Arctic Freezer 34 would be well balanced.
https://www.overclockers.co.uk/arctic-freezer-34-cpu-cooler-120mm-hs-077-ar.html