I am looking to translate "I am sufficient" as if they were Christ's words. Would the phrase be any different if it were being said in an casual conversation between two people? Would appreciate any help. Thank you!

I'm not sure of the best way to say that. Possibly -

Is a ndóthain mé.

Is leor mé maybe. If you think the English is clear enough, then this should be clear enough too.

Wait for more.

That's better than mine.

Thank you! Another question: would it be any different if I used the word enough instead of sufficient?

No...I can't think of any distinction.

Redwolf

Not really. The reason that we have two words in English with what is usually such a similar meaning (as we do in many cases), is that one of them (enough) is Germanic in origin (at base, English is still very much a Germanic language), while the other word (sufficient) came into the language after the Norman-French speakers conquered England.

English has the largest vocabulary in the world, both because it freely accepts foreign words (and makes new words with them), but also because there are often equivalents (or near equivalents) of a word from multiple sources, sometimes three or four words from different sources, such as Anglo-Saxon, Norse, French, Latin, Dutch and, of course, the old Celtic (Brythonic) language(s) of Britain and later Irish as well.

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I'm not a native (or entirely fluent) speaker, so be sure to wait for confirmations/corrections, especially for tattoos.

Indeed; remember, translation is not about translating words, but about retaining meaning, at least that's my view of it. Some Enlgish words have more variants in Irish than in English, and vice-versa, and it's just about using what you have to carry across and retain the same spirit of meaning of the original.