Back on topic:
I find the Wolf to be flat out underpowered now that pirates are using shielded ships and fighters. Its worth having in an early game fleet simply as a numbers filler and to lure the enemy away, and to at least damage the unshielded hounds and cerberi. It is completely obsolete against anything with shields, at best providing some flanking and missiles, at worse blocking shots. Its offense is so bad that it is mostly useless as a player ship.
There are no weapon options that let a Wolf effectively damage shields, because it does not have enough dissipation to fire its single medium gun, let alone doubling up with a front IR pulse: it has poor sustained DPS. It only has the single medium mount (and front small), and no booster system, so its only option for burst damage are Heavy Blaster or Anti-Matter Blaster: poor efficiency weapons. So its burst potential is low. With poor sustained damage and poor burst damage, the Wolf simply has a weak weapons package. In practice it can barely break the shields of the Kite, a 2 OP civilian shuttle, before its own shields are defeated by its front gun and the single dual AC on many variants! The ship can be a decent flanker because it can carry an Ion Cannon, and the Pulse Laser can deal decent armor damage against small (frigate and light destroyer) level threats: hounds and cerberi are its ideal targets.
The Wolf is very vulnerable to interceptors due to its fixed forward shields, fixed forward main gun, and weapon choices. The ship needs at least two beam PD to have a chance of dealing with Salamanders or other missile threats. But these low DPS weapons need stacking numbers to start really dealing with fighters: 2 or 3 is not enough to deal with 2 Talon wings (and forget about Sparks - they melt and destroy Wolves with impunity). Having an Ion Cannon in the front small makes the Wolf a decent flanker, but also means that its anti-fighter DPS is below the effective hull regeneration due to replacement of fighters: it CANNOT kill fighter wings fast enough to live. Add in the Wolf's paper armor (150) which makes the frag and/or light kinetics of fighters a real threat, and the ship is simply doomed.
The Phase Skimmer is a great system that keeps Wolves alive a decent amount of the time, but without offense its a half ship at best. Because its such a core part of the identity of the ship, I don't think replacing it with High Energy Focus is a good idea. Instead, the Wolf needs sustained DPS, or at least better recovery after a burst: more flux.
100 more base flux, bringing it up to 250, would be a decent start. Yes, this brings it higher than the Tempest, but Tempests have an offense boosting system on top of the Terminator drone, so effectively are still much much better. At 250 base flux and 10 vents, a Wolf still cannot fire the basic Pulse Laser and have shields up and be flux neutral. But at least its close. An SO Wolf wouldn't be able to fire a Heavy Blaster, but at least it would be closer than present.
Conversely, I think Shrikes are actually good as light Destroyers, designed to fly at burn 10 in a frigate pack or serve as more powerful frigates in battle! With 550 flux (when vents are high) it can actually support energy weapons: a heavy blaster works! Medium missile mounts are always powerful as well. This opinion is based heavily on me having bought one when I had very few other options, then being absolutely astonished at how well the AI flew and performed in it (routinely getting better than 100% in damage done in Sundog's battle ranking metric). Cheap, effective, damages the enemy, and an OK level of survivability. I did notice them become obsolete before my other destroyers, but thats ok: they are super-heavy frigates, not true destroyers, and by the time they became obsolete I wasn't using any non-specialty frigates at all.