The phrase "a potent attack on" is correct and usable in written English.
It can be used to describe a strong or effective criticism or assault on a particular subject, idea, or individual.
Example: "The article presented a potent attack on the government's handling of the crisis, highlighting numerous failures and missteps."
Alternatives: "a fierce critique of" or "a strong condemnation of".
Mrs. Clinton has struggled to win over white working-class voters, and was quick to use Mr. Trump's remarks as a potent attack on the campaign trail on Tuesday.
In Delusions of Gender, a potent attack on the sexism masquerading as psychology that has enjoyed a renaissance in recent years, the academic Cordelia Fine quotes a male-to-female transexual: "The more I was treated as a woman, the more woman I became.
Mr. Cuomo also struck a deal last summer with the Working Families Party, long a potent attack force for unions on fiscal issues, to appear on their ballot line in exchange for their pledge to support his agenda, including his promise not to raise or impose new taxes.
But Senator Schumer was building the framework for a more potent attack on the nominee — and, indeed, on the Bush effort to reshape the judiciary.
Man-of-the-match Juan Smith initially peeled around the front of a close-in lineout, Mathieu Bastareaud made the hard yards closer to the posts and Smith then popped up on the left, finishing off a potent attack.
Massachusetts Sen. Elizabeth Warren also turned it into a potent attack line while she campaigned with Clinton in New Hampshire on Monday.
Mr. Santorum may have just handed them footage for a potent attack advertisement.
In his time at Southampton, Koeman injected a combination of a solid defence and a potent attack.
Only Sergio Aguero, on his return to the side, carried a potent attacking threat.
Despite the considerable loss of Van Persie - who plundered some 37 in all competitions to help drag Arsenal into third place on the final day of last season - Wenger's side have remained a potent attacking threat.
