Don't be too quick to replace ruin 1 with ruin 2, it's most certainly not a straight upgrade. In short, Ruin 1 offers more efficiency, Ruin 2 offers mobility at the expense of being twice as expensive to cast. The blind effect is of minor value if you don't have a PLD but isn't really enough to make or break the spell.
You should have all of your abilities on your hotbars tbh =P