At rank 5, Blind Rage will give 24% more Ability Strength than Intensify for the same cost, but abilities will use more energy. At this rank, a fully-ranked Streamline alone is sufficient to negate the downside.
Fleeting Expertise can be used to negate a maxed Blind Rage's downside at the cost of Ability Duration.
Combining this with Fleeting Expertise will grant you +5% ability efficiency, 35% when stacked with Streamline, and a total of 129% increase in ability strength with Intensify. This will cause most abilities to be shortened considerably, so consider only ranking this mod up to 5 or 6 and combining it with Streamline instead, otherwise use it with non-durational frames like Mag/Frost/Oberon.
Frames with lower energy pools may prefer to use lower ranks of this mod to cast more of their abilities. (I.e:Excalibur, Nekros, Valkyr, etc.)