What coins you want to pump? All or only some altcoins? Better try to buy some which you think will grow and hold them then to try pump and fail and lose money. Top coins i think will be Ethereum Litecoin and some altcoins from top 100.
These coins at the top 100 are actually the ones showing very strong signal in the market and I think they are the one that really needs to be pumped. Other altcoins will just be a waste of time kind of because they don’t have pushy team or do I say a hard working team, then secondly, there is no much product that is working for them to gain more value.
Aside the alts you mention, BTC will still be the best option amongst them I think it will be better to join hand and pump BTC more since most of these altcoins usually follow it in its increase;it is wiser that way than to pump just one single coin that will have no effect on others.