This category becomes available as the third in the row and all of its basic powers are unlocked during the twelfth mission (Zero to Hero) of the game's storyline. I recommend that you upgrade it until the very end of the game, because many of the following chapters revolve around using it on a regular basis. Apart from that, in itself, this category encompasses many useful powers.
THE NAME OF THE POWER
This is the basic ability connected with fast movement. I recommend that you use it, mainly, in the case of long flights between buildings, although it is also useful in the case of, e.g. fast reaching of rooftops.
Personally, I am not too great a proponent of this power, although you can find it interesting, if you are a fan of attacking enemies, while in mid-flight.
Another, relatively, useless power, connected with remaining airborne for an extended period of time.
Double Air Surge
It is a good idea to unlock this power as quickly as possible, because it allows you to use the flight ability twice, without the necessity to touch to the ground. It comes in handy, e.g. while attempting to reach far off buildings.
This power plays no vital role, although you may want to use it, for accurate movement and allow you to, e.g. avoid obstacles or extend the flight a bit.
Power with upgrades
Since it is the basic attack in this category, it is a good idea to buy both upgrades, sooner or later, thanks to which the energy consumption will drop by a half.
This ability is available for the villain only and it is a good idea to unlock it, because you can then fire more projectiles, in a single burst.
This power is available for the villain only and it is a good idea to unlock it, because it improves on your accuracy and effective range of the Video Torrent attacks.
Shroud of Invisibility
Invisibility is not one of my favorite powers in this category, although it allows for cool surprise attacks or quick escapes from the battlefield, in case in which you sustain more serious damage.
This ability is available for the hero only. You do not need to turn your interest to it straight away, although the fact that the attack does not disable invisibility, makes Shroud of Invisibility gain in usefulness.
The best way to unlock this power is with the one described above, thanks to which you will be able to eliminate2-3 enemies, while remaining completely invisible.
Thanks to unlocking this ability, you can start using the Shroud of Invisibility also while fighting larger groups of enemies, without worrying that the enemies will focus their attention on Delsin, after invisibility terminates.
It is an expansion of the power described above, although it is only available for the villain.
If you liked the effects of the Demon Twins, you can also buy this power, because it summons three demons into the battlefield, instead of two.
Power with upgrades
The blades deal a lot of damage, of course on condition that they hit their target directly. Just like in the case of the Cinder Missile and the Phosphor Beam, in the previous categories, the upgrades are very expensive but, you should not ignore them ( after you upgrade this power to its maximum, you receive five pieces of ammo).
Unfortunately, this power is available for the villain only. If you can, unlock it immediately, because it increases the potency of the Bloodthirsty Blades.
Just like above, you need to play the villain to be able to increase the number of the blades that you fire and, at the same time, deal more damage.
This power unlocks as you progress in the game. You can only use it after your (good or bad) karma bar fills up and, since this is a time-consuming process, leave it for the most demanding battles.
Power with upgrades
Delsin can drain electronic devices for energy, from the moment in which this power category is unlocked. I recommend that you upgrade it on a regular basis, thanks to which you will increase your supply of energy.
You are going to use this ability only in the final phase of the game, because this is when you start running into bosses and enemies that can obstruct you from acquiring Video energy