Quote from: tokexchain on March 08, 2018, 03:15:28 PM

the remaining three words out of the eighteen could be dictionary brute force attacked

Its 3 out of 24.

Quote from: tokexchain on March 08, 2018, 03:15:28 PM

it is not a hard task and would be easier and faster than cracking some missing characters in a private key.

3 words (with a character set of 2048) conforms 8.589.934.592 possibilities.
Where 3 missing characters of a private key (with a char set of 16, assuming hex represantation) conforms to 4.096 possibilities.

So, no it would NOT be easier to crack a few words in a seed than a few chars in a priv key.