That's exactly what I'm asking: what tools? The only thing I see is endless supply of money and ammo which means attrition. Russia will win in manpower but maybe not economically. I'm kindly asking to be educated with more than talking points we've all heard from politicians.
The most critical need is air defense: anti-air missiles and cannons capable of shooting down Russian missiles and drones. Long-range missiles are important too, because it is better to shoot the archer than to try take down every arrow. Long-range missiles can blow up the bombers that launch cruise missiles against Ukraine. This protects Ukrainian cities, factories, and military sites from further destruction.
Next, they need artillery to halt the slow advance of Russian ground forces. With the new unjammable wire-guided drones that were introduced early this year, Ukrainians have already successfully halted Russian advances in most sectors, but ample artillery support is even more effective. They need lots of artillery to blow up with a big bang everything that the Russians throw at them.
Finally, Ukraine must be equipped for counteroffensives. They need a large supply of planes, tanks, IFVs, and other vehicles to go from defense to attack and liberate occupied territories. Once Ukraine has the means to counterattack, it is up to them to decide how far they want to go before sitting down with the Russians to negotiate peace. Strong enough pushes by Ukraine may force the Russians to concede some areas without a fight, just as they previously withdrew from Kyiv, Kharkiv, Kherson, and Sumy.
The current approach has been a slow trickle of aid in a naive hope that Putin might back down. That strategy has clearly failed. Ukraine needs full support, everything we can provide. This is both the moral choice, and the cheapest option in terms of money and lives.
It is really important to stress that Ukrainians do not expect others to fight for them. They are only asking for material support: weapons, ammo, vehicles. The rest they can handle on their own.
