If you usually use Insight to search for Fusion then the fusion looks better here.
Blast with Chain is for Gearfried I suppose. This one depends on the number of Gearfried you have
Perhaps the Blast chain is the better option here, if you have a deck that can recycle your Gearfried, because you are not guaranteed to always have Gearfried + Blast chain at the same time.
Once you have no more Gearfried I don't see how you could make use of this trap. So can your deck recycle this warrior ?
If you are using your dream tickets you still have until next year to decide right ?
New Red-eyes card might be released by then. If the new ones are even better than Red-Eyes Insight and Blast with Chain you might regret using it now.
Since you will likely make a 20 cards deck you are not going to have enough space to use 3 copies of each card anyway.
Currently, there are a lot of cards that actually bypass Red-eyes slash dragon's protection effect. I think you already have 3 Slash dragons in you extra deck ?
Then another red eyes fusion might be better than Insight. Because if Slash is banished Red-Eyes Spirit will be useless.
Melodius decks are going crazy with the grave banishment.
Concerning Red-Eyes Spirit, the free-to-play alternative could be Black stone of legend. It takes more time to get your monsters back on the field but a single Black stone can potentially recycle your whole graveyard given the opportunity.
It can also help against decks like Darklord that try to deck out Red-eyes decks when they can't win against your Slash dragon anymore.
If you are F2P you likely have only 1 Slash Dragon. In that case you should try to protect from banishment or recover from Slash being banished. If he is your only boss monster that is since your match will usually depend on that 1 card.
There are many banishment cards that do not target
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