What's the best way to roll and change positions at the same time?

Hi all,

Let's say I am long 10 June contracts,

and I will reduce it to long 5 July contracts the next day,

what's the best way to do this?

I am thinking of:

(1) sell 10 June/July spreads
(2) sell 5 July contracts

vs.

(1) sell 5 June contracts
(2) sell 5 June/July spreads

which approach is better? I guess the second approach, since it's smaller number of trades?

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Now, let's say I am long 10 June contracts,

and I will flip it to short 5 July contracts the next day,

what's the best way to do this?

I am thinking of:

(1) sell 10 June/July spreads
(2) sell 15 July contracts

vs.

(1) sell 5 June contracts
(2) sell 5 June/July spreads
(3) sell 10 July contracts


vs.
(1) sell 10 June contracts
(2) sell 5 July contracts

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Looks like the 3rd approach is better?

So the conclusion is:

if the new month positions are of the same direction of the old month positions, we use spreads;

if the new month positions are of the opposite direction of the old month positions, we don't use spreads, and just go direct buy/sell.

Otherwise, it's always good to use spreads whenever possible when we roll.

Am I understanding it correctly?

Thanks a lot!