In that case, your feedback is also going to fall on deaf ears if you choose to follow some people’s builds and guides like Maya’s but reject everyone else’s builds and experiences just because you don’t understand how to make a strong Skeleton summoner.
From my experience running them both in the past and recently, it’s not just health and resistances that pets need. You also need a way of healing them consistently.
On the last pet build I ran, I found to my dismay that just giving the Skeletons the 4% ADCtH node on Toad and Twin Fangs wasn’t nearly enough. Even bulkier permanent pets like Dirge of Arkovia’s Skeletal Golem got worn down during or inbetween fights and frequently needed resummoning. So I made some changes shifting my devotion setup over from Mogdrogen to Tree of Life (and Ishtak) and swapping my second mastery to Occultist to pick up Blood of Dreeg and that solved all of my problems.
Similarly, in the past, I’ve also posted a Skeleton Ritualist in the last couple of months that used Wendigo Totem to keep my pets alive as well. The heal and large amount of ADCtH on it is stronger than you’d think at first glance.
I just ran the above Ritualist through collecting all 3 Seals and the build’s first run of the Tomb:
Like you, I noticed about half of the Skeletons get nuked early on but after a re-summon, they pulled through without any more casualties just fine, straight facetank, took about 10 seconds.
Already shown in the posted thread but the same character can kill Lokarr whom I consider harder than Morgoneth. I have no problems on any Nemeses or other roguelike Bosses. Character can also farm Crucible or SR for Legendaries just fine.