Ashwagandha and Yohimbe directly work on erections (supposedly.) I would look into those.
Tribulus Terrestris might help? Supposedly it helps with circulation. I don’t really know.
Do some google searches them for reseach and see what the claims are.
Take caution with Yohimbe. I took GNC Yohimbe 451 and I had cold sweats and a rapid racing heart. It may have been due to a combination of things I took but I’ve heard racing heart is a associated with Yohimbe. I’m not saying don’t do it, but just go easy with it. That being said I took Yohimbe, 2000mg L-Arginine, Korean Ginseng, Horny Goat Weed Complex (from pipingrock), possibly even one other thing, then also took avanafil (Stendra, an ED drug) and I had the most wicked hard on in my life. I kind of scared my wife with the boner from hell but I was having cold sweats, racing, heart, and had the giggles (no kidding, like I was on weed or something. Some combination of those things really worked way too well.
Ashwagandha, the jury is still out. I haven’t really tried it on it’s own. You get energy from it so I wouldn’t use it for prolonged periods so cycle it. If you use it for 5-7 days you might start to really get run down. Either way do some google searches on those to and research them.
Maca is going to work more for libido, not erections. Same with Korean GInseng and Horny Goat Weed. They are supposed to help with libido but not necessarily on your actual physical hardness.
I would continue to take L-Citrulline (not sure how much) and L-Arginine with your stuff. They help with maintaining erections especially if you’re deficient in nitrates (vegetables.) Maybe take 2000-3000mg per day (1/2 in the morning, 1/2 evening. (L-Arginine doesn’t stay in your system for a long time) I was taking GNC ArginMax daily for a month (3000mg of L-Arginine with some vitamins and other stuff) and It kept my limp plump and gave me easier erections, I think. I wouldn’t say it’s the best thing but I think it helped. I wouldn’t waste the money on Arginmax as it’s mostly just L-Arginine which is cheap: (L-Arginine 3.00 g, Korean (Asian) Ginseng Root Extract 100.00 mg, American Ginseng (root) 100.00 mg, Ginkgo Biloba Leaf Extract 50.00 mg) + vitamins
So look into those 3 (at the top.)