The following Cheat commands may help those that dont want to play fair :p

LEBAddAbility [AbilityName] [Weaponslot]
(from XylthDebuggingTools by xylthixlm)
Use this during a mission to temporarily add abilities to the selected unit. Valid commands are:

LEBAddAbility LEBTelekinesis eInvSlot_SecondaryWeapon
LEBAddAbility LEBInvigorate eInvSlot_SecondaryWeapon
LEBAddAbility LEBTelekinesis_Adv eInvSlot_SecondaryWeapon
LEBAddAbility SquadSoulSteal eInvSlot_SecondaryWeapon
LEBAddAbility LEBSavior eInvSlot_SecondaryWeapon
LEBAddAbility SquadMindMerge eInvSlot_SecondaryWeapon
LEBAddAbility LEBWingedLance eInvSlot_SecondaryWeapon
LEBAddAbility LEBSingularity eInvSlot_SecondaryWeapon

LEBGrantKills [Number]
(from XylthDebuggingTools by xylthixlm)
This command can only be used when having a soldier selected in the armory. Use it to give this soldier kills for leveling up

Example: LEBGrantKills 100

LEBShowRolledPsiAbilities
Shows the PsiAbilities array for all PsiOps. This lets you see, which skills the operative wants to learn in which order.

I want to train my Psi Ops faster!
Open the XcomGameData.ini in your LW2 mod config folder. There you can change the lines XComHeadquarters_PsiTrainingDays and PsiTrainingRankScalar of your difficulty to your liking. If you set both values to 0, training will be instant.