それこそ => exactly that N3
Emphasis on degree
それでこそ => Such N3
Cause, reason
それから => Afterward, from that N5
Happens next
それはそうと => anyway N2
からこそ/~ばこそ/こそ => precisely because ~ N2
これ/それ/あれ => this/that N5
Spatial relations
それを => Despite that ... N2
Things do not match the prediction
それはそうと => By the way N2
Miscellaneous
それでは => Well then N4
Change the subject of the story
それでは => So (Inference) N4
Deduce
それは => That/That's it N4
... るとか ... るとか => それとも... または N4
Demonstrate by example