Why not use wget? Or download installler-hack directly with browser?
How doyou try to install openrepo mirrors? Just enable third-party installations in settings and tap on it in transfer popup or file browser.

About aegis-install and its safety against MALF: I have no idea (as using open mode) but would assume that coderus knows what he published and there were no claims. So it will be safe ( nevertheless backup always suggested ).