I understand that, but that's not my point. ST can also be amplified by Bane, weapon attacks, consumables (spike bulbs, grease bottles), other spells, items (absolute gloves, ritual axe). How is it different from bliss spores or bless or staff of arcane blessing for attack rolls? Point was, that using a single target controlling ST spell, even if it had a straight +4 bonus, against a regular bandit is suboptimal.
