If we talk about the impact, of course this will have an impact on the world economy, albeit slowly. If you want to defeat the West, don't go to war but destroy its economy, withdraw all countries rich in natural resources, especially mineral and natural energy resources such as oil, gas, coal, nuclear materials and others. Surely western countries are chuckling. And continue to change currency exchange rates in trade transactions, throw away dollars and euros, the western economy will surely be more and more destroyed.
What is being asked in this topic is "Would the world economy suffer or would we be fine?" when Russia and Africa began to build strong relations in the economic sector so that both of them could carry out several things that the OP had mentioned in this topic, including diamond mining, SME partnerships, agribusiness, energy cooperation, logistics routes, and financial security. But in this discussion you are explaining options for destroying the western economy, even though Russia and Africa are cooperating in several economic fields only to make themselves better than western countries.
So that more and more countries leave dependence on the west with fair and mutually beneficial cooperation without embargoes, pressure or discrediting other nations as inferior. Putin is indeed a smart leader in fighting western hegemony by attracting many influential countries, especially those rich in natural resources, to join non-Western international organizations such as the BRICS. Attracting many oil-producing Gulf countries will certainly be able to hit the western economy, especially in terms of energy and there will be no more petro dollars in the Gulf countries.
The Russian side may have thought of this beforehand because Russia also wants to become an independent country in terms of the economy, which gave birth to the idea of building a non-Western international organization such as the BRICS. So that countries that support Russia will no longer depend on the dollar and will only develop the currency of their respective countries in all international trade so that this might have an impact on the economic development of western countries which are still very supportive of the dollar.
Imo, the African-European trade was like modern colonial slavery. From chocolate to nickel, they supply Europe at low prices using a system of coercion and even using children. So they have a cheap supply of Nickel and Cocoa, while HAM and the UN are only calling for an end to fake African slavery. this is a good move for Africa to be independent with the help of Russia, they have a chance to escape European slavery. I support Russia in this.
I still don't think too deeply about this kind of thing because things like this are also influenced by the sophistication of factories that are owned in every country in the west. Because Africa probably doesn't have a factory to process raw chocolate and Nickel so that it becomes a more useful item in life, so it's still happening now and I don't think it's because of compulsion. But because the capabilities of countries in Africa are still very low when compared to countries in the West.