Yeah already doing that. I usually try to get on a rock or anything that elevates me to the fly's level... I just wish they had more aim control with its attack, or at least have a jump attack
I've been taking another 2 frogs with me. They've been a lot better than most tames for following (looking at you anky) - if I have trouble targeting a fly, I just whistle attack target and they get it instead
It's not angle. It's the frogs hitbox. You should move backwards a bit. The flies attack the frogs bsck (riders height). You could try to pile them. And harvest with frog, if it's the case