If your grid is bad, you may want to wait until you raise it before using the mtix (you'll have a couple of months before the next). There's basically three parts to being strong... the Eidolon, the Himes, and the Grid. You have the first, and the 2nd can be fixed with the mtix, but without the grid it still won't be very strong. In the long run, after you put together a decent grid, having Managarmr should put you ahead.