Yes this would be my choice if I expected to majorly join in for other than spy stronghold defenses/attacks ... but I intend to be only/mainly doing the spy stronghold defenses/attacks.  So I am thinking my ubber would be best for this and I do not plan to do spy attacks for towns.

Personaly i use wendla and hero scouts gear for defending scouts marches during siege, for all other marches i use hero ubba and raine shaman. Use total defense, total health and total offense gems, runes total health/health guarding fortress.... makes it easy to switch troop types without switching shaman or hero... i have siege cavs and killers as troop types (secret knowledge: fortress, defending , attacking)

If you only have 1 troop type , i woukd suggest you make hero and shaman for that troop type only. More kills than with ubba and raine . 👍

It would seem no one likes using Raine against Jotun scouts even though Raine has at least 600% total extra health/ defence/ offence, in defence, compared to Wendla (well mine has anyway).  ???

My Raine has melee runes and gems (i.e. not counted)  and still has 600% more health/ offence /defence in defence than Wendla with all her scout gear gems and runes combined.

(NB Raine's levels of legendary gear adds up to 19 and Wendla's legendary gear adds up to 20.)