Introduction
Psylocke returns from X-Men: COTA with quite a few changes. While she has gained more moves and somewhat more mobility, her damage has been nerfed in a game where everyone else still does a fair amount (or at the very least has better health). This puts her in the bottom tier, and makes her more reliant on gems to compete with the top.
Moves List
Psylocke still has quick moves with decent hitboxes, however she does suffer from bad range on her crouching short and launchers, making the standard low into launcher->air combo a little more awkward for her compared to others.
Psylocke has a triple jump.
Normal Moves
Magic Series
Ground: standard zig-zag
Jumping: standard zig-zag
Super Jumping: standard zig-zag
Throws
Standing
MP: Pretty quick punch with good range and a decent hitbox. When Gem Alpha Countering, this will usually be your go-to move to combo into due to the range.
f.MK: Slow-ish cartwheel kick that's still not an overhead, but you can combo after. During Time Gem, you can repeatedly combo into and out of this (see Gem notes)
f.HK (hold): Hold toward to roll over with a decent amount of speed and momentum as well as pass through your opponent. In normal use, this is dangerous since you'll likely get hit/thrown as you are passing (they recover before you do), but with Time Gem active this move is excellent for a side-switching midscreen combo.
b.HK: You hop back slightly and slowly before throwing a standing HK. As an attack, there isn't much use, but there's some gimmicky usage in using it to slightly alter your ;position, then cancel to something else (Psy-Flash, Teleport..)
Crouching
c.LK: Your quick low with rather poor range.
c.MK: Mini-Launcher
c.HK: Sweep, also with somewhat limited range.
Jumping
u.HK: Upward striking 2 hit flip kick. In normal jump mode, this will pop up even grounded opponents. In super jump mode, the second hit causes flying screen and knocks away.
Special Moves
Psy-Flash (Psy-Blast) - D,DF, F + Punch , ground/air
LP: Downward and outward angle
MP: Straight ahead
HP: Upward angle
This move is slower and not nearly as spammable as before in COTA (only one can be on a screen at a time). While a needed tool to zone and build meter, using it too often will result in the opponent getting around it and in, or trading with it and hitting you with something that does more damage and potentially knocks down/juggles. It's a bit more annoying for big characters who have trouble avoiding it.
Psy-Blade - D,DF, F + Kick , ground/air
LK: Straight ahead
MK: Upward angle
HK: Straight up
Hit another kick after the initial one to get another spin in the type you hit, up to 2 extra hits. You can't hit the same one 2x in a row, but you can hit it again after hitting a different one (ex QCF+LK, HK, LK). Psy-Blade now knocks down, but is rollable. It recovers a little quicker but if blocked at close range, it will still get punished. If used in an air combo (especially a high up one), it's likely not safe against rolls.
Super Moves
The Basics
Advanced Strategy
Gem Notes
Specific combos and tactics during offensive gem power ups. Ideally, you'll want to activate these Gems as a punish where the Gem startup hits the opponent, or hit them out of an attack string (grounded preferably), combo into standing MP then whatever the situation calls for. If you Gem Counter an airborne opponent, they will be knocked away (unless you have them flush in the corner).
Time Gem
Power Gem
Reality Gem
Match-Ups
Blackheart
Captain America
His dashing pokes (HP in particular) will most of the time beat out your dashing pokes, and take off a chunk of life. Jumping HP has an enormous hit radii that can mess up your attempts to dash under him and scoop him up from behind when he jumps. Crouching MK has unblockable frames, so getting stuck in grounded block strings is quite dangerous.
Hulk
Iron Man
Juggernaut
Not as fast as Hulk, but has armor. Space Gem gives him hit invulnerability, but he can still be thrown and take damage from it. Using up Space Gem from afar rather than waiting to use it as a Counter isn't a bad idea, simply so he can't use it against you.
Magneto
Psylocke (Mirror)
Shuma Gorath
Spider-man
Standing Strong your worst enemy.