"more effectual to" is grammatically correct and can be used in written English
It means that something is more capable of producing a desired effect or result. You can use it when comparing different methods or approaches to achieve a certain outcome. For example: "The new advertising strategy proved to be more effectual to boost sales than the previous one." "The medication was found to be more effectual to reduce pain than the alternative treatment." Another example could be: "The use of technology has become more effectual to connect people from different parts of the world."
In order to be more effectual ― to actually have power to conduct oversight, or introduce legislation ― Democrats have to win elections.
Much of the frustration, the analysts say, stems from the lack of any more effectual ally to which Riyadh could turn, as former European colonial powers such as Britain and France have even less influence in the Middle East and Riyadh is unlikely to find much common purpose with Russia or China.
Caroline may call Cindy a "crazy Christian," but the redemption that she's pursuing may not be any more effectual than the prayers she allows the pastor to say for her in her office after a tense meeting with her boss.
In terms of revolutions, the dissent of the middle classes proved ultimately to be both more contagious and more effectual than anything dreamed of by the Surrealists' proletarian revolt.
In the encyclopedic "Art of War," he suggests an improved design for forts, but he is still concerned with inner rebellion (he forbids an inner keep where the residents can hole up and tells us starvation is more effectual than siege).
The antidiabetic effect of Qurs Tabasheer was more effectual than Glimepiride.
As a result, β-cyclodextrin-curcumin complex was more effectual than free curcumin in telomerase expression inhibition.
The Poor Law, which was designed to provide a "more effectual Relief of the Destitute Poor in Ireland" (O'Connor, 1995: 68), was based on the ideological perception that people had a natural passion for idleness, and that disincentives were needed to enable the poor to evade poverty (see de Tocqueville, 1835).
Primary prevention that controls a common source of exposure to proven and probable carcinogens is far more effectual, and cost effective, than persuading thousands of persons to each change their individual behaviors (Asaria et al. 2007; Doyle et al. 2006).
In order to ascertain conservation landscape strategies more effectual, there is an immediate requirement for coordination between farmers and conservationists to improve livelihood of farmers.
In response to these actions, the government introduced the Black Act, formally "An Act for the more effectual punishing wicked and evil disposed Persons going armed in Disguise and doing Injuries and Violence to the Persons and Properties of His Majesty's Subject, and for the more speedy bringing the Offenders to Justice", to Parliament on 26 April 1723; it came into force on 27 May.
