You have three bussed System effects in Mix mode.

Reverb Types with a Reverb send for each Part in a Mix.

Chorus Types with a Chorus send for each Part in a Mix.

The Chorus actually has many 25 different effects including flangers, phasers, and delays of all types including MIDI timed delays, etc. Variation Effect with a Variation Send for each Part in a Mix.

The 25 Variation effects include compressors, chorus, flange, phasers, auto wah, distortion and others, but no delays.

You also have 1 Part which will have it's two Voice insert effects Insert 1 with 25 types and Insert 2 with 104 different types) and you can change which Part has it's inserts turned on in real time.

It would be impossible to have two delays and a reverb on each Part, but you could have one delay, one reverb and one variation effect on everything plus 1 part with an Insert effect.