Effect Orbs

[SmartyPants]

Which effect orb is the best and why would you pick that one?

[hellboy222]

I go with yellow because you can dish out more powerful attacks more frequently.

[Barzul]

Green. Combined with my superstat Main, he can dish out damage anywhere in the map.

[torugo]

definitely green because that way you get easy back strikes

[Ertxiem]

Yellow orb. The recover rate allows me to do more powerful attacks.
When I have a superstat Main, then I agree that the green orb may be more interesting.

[KZ]

The green orb allows for more battlefield coverage and can compensate the lack  effects of the yellow orb by letting the Main escape the enemy through running around and regaining PsP, whilst not coming under fire. For superstat Main I would say it is the best one. For a medium-stat Main, the yellow orb can be highly advantageous. For tackling the Psy Academy for the first time, the Inidgo effect is key quite a lot of the time (or, for defensively-minded players).

[Frosty]

I like green, because I'm always cold affinity, and it lets me get in the midle of everything and hit them with cyro cross a lot (I usually have the indigo and crimson orb too in TPA2).

[SmartyPants]

For gold farming, I prefer using the Crimson Orb, because it allows me to kill more enemies in a shorter number of turn.

For missions, I prefer using the Green Orb for reasons mentioned by other green orb supporters.

[Presentiment]

Because Telepath battles are usually over in a few turns (and because I do not over-level my main), I use Green Orb.

[Zackirus]

I use the green orb mostly because I find that without it my hero is always stuck in the mud and buy the time he gets to all the action theres nothing left for him. With th green orb my her can easily eliminate most enemies. But with the yellow orb combined with spirts can give my hero Light Bombs more often. 

[lentro]

I use Crimson Orb most of the time, it helps me get through battles much more quicker  and easier than any of the others since i mostly have my main in the center of the map with really high psp. So that leaves off yellow and green, and to be honest, I never paid attention to the indingo orb. Never bought it from gelf.

EDIT: I looked in the Orb walkthrough section and found what it did, I haven't seen festus slacking on his job so I see no reason to overcompensate healing.

[Bromtaghon]

I only use the green; I've never had the yellow, I detest Pyro Hail and the Crimson, and I rarely use the Indigo.  The green is my favourite..

[lentro]

Can someone post a list of pros and cons to the orbs, that would be a bit more helpful on establishing which is better for which person. Normally I am an all out attacker, so if I don't win quickly I won't win at all. Most of the enemies seem to like grouping in on my main when i send him out, so pyro-hail backs me up along with vengance. Maybe you're more conservative Bromtaghon, therefore you want more psy. But not everyone goes with the same fighting skill. Since I would do terrible with defence, I don't waste to much time on recharging except on boss battles. If my opponent doesn't die in the first attack, I send everyone at him until he does.

[Bromtaghon]

Crimson Orb
Effect: Unlocks Pyro Hail
Pros: More damage, greater range
Cons: Can't use Pyro Blast anymore, Pyro Hail costs more PsP

Green Orb
Effect: 9 Speed
Pros: Greater mobility
Cons: None, other than no other effect orbs

Yellow Orb
Effect: Increases amount of PsP gained when focusing
Pros: Less having to rest to regain PsP
Cons: None, other than no other effect orbs

Indigo Orb
Effect: Changes Mind Shield --> Big Shield
Pros: Greater range, Hero can heal others more efficiently
Cons: Costs more PsP than Mind Shield

[lentro]

Thanks Bromtaghon, it seems to me that Crimson and Indingo Orbs have the best bennefits but also come with bad side effects, they are also the only ones that effect what moves you have.