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 builds that do not rely on duration.
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.)