Shelgarn's line of spells

[Walrus Warwagon]

They are very fun spell, working similarly to summoning or phantoms. To truly specialize on them you need to do some heavy investment, as GSF Abjuration is the only way to extend their duration (cannot be prolonged with Extend), and SF/GSF Evocation is the power multiplier, by numbers.

And for this line of spells, like with any other summonings, their power is in numbers.
But they are also very obstructive, making it hard to navigate tight spots and to move for the caster and other people. Controlling five of them is like herding cats. For such a fun spells it feels a bit bad not to use them to their full potential.

What if they would differ from other summoning lines by their power multiplier being not the numbers, but direct empowerment of the construct itself?

My suggestion is:
SF Abj - increased duration
GSF Abj - chance to resist dismissal
SF Evo - you can control three of them
GSF Evo - you can control them with greater efficiency - your shelgarns get better stats, saves (defaults are awful) and HP, but they stay at three pieces max.

[Walrus Warwagon]

It'd be a fun change, I think. Any opinions?