Yes, to being able to steal spells off of sneak attacks derived from telling blow.
No, to chronocharms on the head slot, unless you are willing to pay the 1.5 premium for an off-slot item. If you want them to be braids, I think they will need to be slotless items, i.e. at 2x price.
In my experience, at this level most mages and spellthieves act as toolkits rather than artillery. In few levels they start evolving into the latter role, with several slots available for dishing damage. Fighters and barbarians rule the low levels at dealing damage, but so do many of the opponents they go toe to toe with relative to their hp. Later, they slow down the damage output except when power attacking, but rather just become really difficult to kill.
So don't worry too much about your damage output. You will be aptly rewarded when you steal that improved mirror image spell that has been annoying everyone.
Summoned critters are in fact very good ways to set off traps, assuming that they don't reset immediately upon triggering. There are some traps in this module that disabling provides a longer reprieve than setting-off.