Wanda first. The thing is that a native T2 internally is still a T1 char as long as he is not level 60, so its important to get her to 60 for WBU and SL level 25+
The only thing you really need Apo for is the combat villain ABX day. It was always annoying for me before i had them, but i you can reach 100k without problems with other toons, no need to hurry.
Yeah, also especially if you can enlock potential then you need level 20 gear first, and its always good to bring them to 62 at least since that gives also quite a good boost in T2 content.
Newest example, my Proxima with 20 gear, no urus and no obelisk needed 2:20 on auto for chapter 13-1 at level 60.
After bringing her to 62 she did it in 55 seconds.
I have meanwhile the impression that especially the Black Order chars are a little underpowered at 60 and really need the 62 more than all other chars. On other chars it was often 1:40 at 60 and 0:50 at 62. But my Corvus was as bad at 60 and my Black Dwarf also needs over 2:00 at 60.