ive just made a summoner as a fun char since i could afford it,
if seen mass neccy uber trist's on youtube... and also ive made my own UT sorc. ( very hard! )
i intend to put my neccy in UT to see how he does,
but
why infy?
this only really benefits ur skelly mages with the - resi
my build is nearly identical to this but i take pride merc,
lvl 20 conc gives all ur minions gozu damage along with some adds.
so not 100% on guide, i see pride as a more valuable item
i may also try make UT with a neccy that uses faith merc, and either pride / infy on himself, to see how that comes along
ill keep you posted about how my UT goes!