Boohma is actually a great choice for mono-Jungo. He's fragile but the rest of the gang has high power and he provides some much much much needed low pill advantages. My take:
Sylth / Niva (Niva with Jalil, Sylth with Nyema)
Nyema / Jalil
Only Boohma is below 7 power, you have plenty of gap, 3 attack manipulators which shores up a lot of Jungo's weakness, plenty of gap, missing SOA and SOB though, which is probably Jungo's biggest weakness, lack of good SOA and SOB.
Also, in mono Jungo, I think winning abilities >>> gap increase. Every Jungo has plenty of gap except Mindy and Pegh, you don't need to worry about that, winning rounds is what's really needed, and that's where Radek and Scopica are really very necessary over the other 3*