i stand on the spore tower and shoot hint 2 to up, i use serpent staff for this
i also dont stack the spore and golem so golem aura reaches walls so it heals them. Also its very important the physical walls are far enough way that your twrs arent getting slapped by ogres, after you have 2 summs on twrs in wave the golem aura will be larger so can compensate a bit more range if need it.