(Image credit: Getty Images) A shifting economic landscape is reshaping venture capital in real time. The mandate hasn't changed — returns still need to materialize within a decade, often sooner — but the path to get there has. Investors are tightening their filters, raising the bar and taking a far more disciplined approach to where they place their bets. The old "spray and pray" model is fading fast . In its place is a more selective, high-conviction strategy: Fewer deals, deeper diligence and far more hands-on involvement. For startups , that means the margin for "almost good enough" has all but disappeared. From just $107.88 $24.99 for Kiplinger Personal Finance Become a smarter, better informed investor. Subscribe from just $107.88 $24.99, plus get up to 4 Special Issues CLICK FOR FREE ISSUE Sign up for Kiplinger’s Free Newsletters Profit and prosper with the best of expert advice on investing, taxes, retirement, personal finance and more - straight to your e-mail.…