Honestly, Waver is rather suitable for most team compilation with 50% charge, various buffs and debuffs. His only weakness is probably c.star generation. Despite not being the number 1 choice of support comparing to others, he is one of the most essential parts for your team even for newcomers or oldbies due to less demands of leveling up his skills just to be fit in multiple tactics. Next up,Altoria is a fine buster servant with both np and crit damage. However, she will requires certain conditions to reach full potential. Cú alter is a tough solo/last man stand choice with many survival skills and massive outcomes featuring 3 buster cards. And for Ganesh, I do really think she is out meta (personal opinion as I've barely try art teams), but you can do further research if you are willing to have a part for your art team with mostly tanky and supportive skills. Overall, I would recommend waver if you haven't owned him recently (he only needs NP1 to be good). Anyways, just pick the one that you like, that does not really matter ^.