Same answer, No, splitting the stake up won't help at all, then you get twice the quantity of votes with half of the quantity of impact. This way you reduce your influence and not grow it.
If you split up your stake you probably won't be able to elect any top 20 witnesses. So you'll probably elect 20 top 60 witnesses which doesn't help you a lot.
120mv distributed in 10 votes = 120mv each vote.
120mv distributed in 20 votes (if its 10 votes per account) would be 60mv each vote.
But it reduces the slide each of the people get, that's the entire point I'm making.
I really don't get your point.
Right now everyone has 30 witness votes. Where each witness vote is worth the full vests the account has. Let's denominate this as "x" vests.
If the account only voted 1 witness, this witness would also only get one vote worth x-mv, thus, he should vote 30 times since this way he is able to distribute 30 x-mv in votes.
If we restrict his power to 10 votes, he will be able to vote 10 x-mv in votes.
And if he splits this up, it's not worth it.
The total quantity the account is able to vote is 10 x-mv, or 20 x x/2-mv or 40 x x/4-mv, but the more the account splits it, the more difficult it will be to make the vote decide who is in the top 20.