Caribbean stud poker variant

Hi there. Looking for proffit in this nice table game, i want to ask if there is any simulation or calculation for this variant, to know if the house edge could be minimize to zero or be finally an ev+ game.
This variant allow to discard 1 hand card, buy 1 card at the ante price, and still fold if there is no possible play. F. E. : looking for straight or flush and no complete it.
So, the worst scenario in this variant is to loose 2 antes and 1 bet. For exemple with a pair of 2 usually i buy 1 card looking for trips or DP, or in any situation that the hole dealer's card is bigger than my pair. If i got a pair of 6 and hole card is 5 or less, i play directly whit no buying a card.
I hope to understand my question. My english is poor, i know. Thanks mates!!

I read the Wizard's Ocean caribbean description and strategies. Finally, it says "The lower right cell shows a house edge of 1.04%.

After possibly switching and raising, the average final bet, including the switching fee, will be 2.183772 units. The element of risk is thus 0.475%. On average the player will switch 8.4% of the time."
Honestly, can't get it. Is it proffitable or not? 🤔

It is not profitable.
(If it were, no casino would offer it.)

Half a percent element of risk is comparable to Blackjack. Variance is higher, though, which in my opinion is good since we look for a positive result.

Higher variance and higher min bet (3 x ante) means you need a deeper bankroll and a resistance to losses in waiting for the occasional positive surge.

Résistance to losses also means refraining from buying when you get a bad hand.

Your examples show bad decision: the price of buying is too high for the expected reward. Just accept a small pair, and wait for a next hand to be better.

As you have noticed, the version of Carribean Stud that you describe is a variant of Oasis Poker.

Of course, there are many instances in which discarding one card and buying a second card is profitable for the player. Leading examples are when you have four cards to an open-ended straight or flush (or both).

Having a small pair and buying one for DP or trips duplicates and triplicates the bet reward, this is an important point. If dealer wont opens, the ev becomes to zero. However, if i think this game as you say in casino's edge, then i must resign and no play it at all.
The only proffitable game of this kind, then, is NLTH agains other players. And also, that one got his own rules, risks, and ev variants.
What a thing, gambling...