There probably is a compromise. For example, you could probably say that what an armorist can summon or bind to themselves is limited by the cost of the item they would otherwise be able to bind. Thus for example a:
Level 1 Armorist: Can only bind or summon equipment which is worth 800gp or less (most masterwork equipment fall into this category)
Level 3 Armorist: Can only bind or summon equipment which is worth 2,800gp or less (most +1 equipment fall into this category)
Level 5 Armorist: Can only bind equipment which is worth 8,800gp or less (most +2 equipment fall into this category). At 6th level, the armorist may also summon equipment of this same worth.
Obviously, arsenal tricks that allow for other special materials or add an additional +1 may either increase the allowed worth, or be granted for free.
Using this compromise, a player wouldn't be able to have a laser torch bound till level 5, or summoned till level 6.