Just came back to this part. Looking at your seasonal Necro Ragnarkain you’ve picked a build that needs a lot of button smashing, i.e. skeletal mages. If you want something a lot more relaxed, take a look at my Necro Bonestorm which has a variant of the “Lazy Necro” on her. Effectively this involves using Bone Armour to get stacks of protection and a swirling bone storm that clears out weaker enemies. You then use Siphon Blood to cause Blood Novas which destroys large packs of enemies. Re-cast bone armour once a minute to maintain the stacks (or you can use it more often to stun mobs).
So, essentially, bone armour, walk around killing stuff, siphon when lots of mobs / elites / guardian. The curses in use are all in their aura variants, i.e. they automatically affect enemies rather than you needing to cast on them. The helm used automatically causes Blinds which, in combination with Bane of the Trapped’s slow aura, procs the damage bonus from Krysbin’s Sentence.
Absolutely no button mashing involved what-so-ever.
Also, if your hand control is poor, you could also consider items such as…
https://www.amazon.co.uk/dp/B00WS2GZU2/
…which allow you to issue keyboard commands by use of foot pedals.