Tank support item stacks too slow

Anyone else notice how ridiculously slowly the new tank support item stacks compared to the AD/AP one? I can hit final tier on the damage items in like 10-15 minutes if doing a good job poking, but even getting all the canons (and melee minions not to hit cap), it takes 20-ish minutes if not longer to stack the tank one. I don't know if that's intentional to prevent tanks from getting beefy too fast, but it's just something I've noticed. I think an easy fix would be to just make it count both the gold you and your ally receives on the stack, so that way you're hitting the required amount in half the time.