Necro book from hate that good?

[syztem]

Got a 55 necro, Probably won't be taking him to 59 60 for a few months. But not really familiar with class focus items, How much of a difference would a 53 necro or 59 EoT pet be with this? I see some shamans, sometimes necros that resummon pets multiple times(mostly ones without books) to try and get the highest level pet that hits max damage. If I were to take my necro to 60, would the focus book REALLY make a difference. It does +1 level to the pet? so a few damage, hp extra at most?

Just curious if I should bother to pick one up on my necro, On a off note any suggestions for a semi cheap mainhand? I have a drachnid thyxl ready to go offhand, but currently using a chetari wardstaff. Sorc bowl seems to be the best option atm for around 5k, I didn't realize til today it had 50hp also.

I really do want to take him to 60, but I want to finish up his VP key to loot a soul well staff(did this with my last necro, and even at 60 let alone sub 60 its godly for exping) that way I can go charm down in HS basement solo some exp up. I am thinking with staff of undead legions being lootable again and the fact I have 4 of them, and probably 2x as many dawnfires I could tear through it and just re loot them when I am done.