Remind me how long ago you started?
I’ll tell you, I really went for quantity over immediate needs from my 3rd or 4th month into the game until my 19th month (now), and I got exactly what that style of summoning grants in the way of consequences. Over 150 units at 5*, and this
I have quite a bit of foddering power for a f2p. At what cost?
The game was pretty disgusting from the time I started pinching (around month 4) until about 13 months in. That’s when I started having enough copies of everything that I could play looser and never run into situations where I knew that I wanted to fodder some 4* unit and didn’t have a copy. But before then I was working with very little and AA became pretty annoying when I was trying to play with underinvested units. GHBs and stuff I could generally find a way to clear using my merged units (and eventually my understanding of the game improved enough that I did them with unmerged 5*s), but I hadn’t set up the hard-counters for AA with blessings and everything and it got pretty wretched sometimes. Also, in general the game wasn’t that enjoyable. Veterans like @Krazytre will remember that I spent a lot of time just helping others make builds and complaining how stupid the arena scoring system is
because I decided, questionably, to respect it enough to merge some of the 3*-4*s that I liked most, leaving me no feathers for just about anything else. Now I don’t even use my merged units that much outside arena, half because two of them are dragons and we’re getting to the point of “throw a stick and hit an anti-dragon” and half because my taste in play style took a huge turn that you can read about if you want. I made a thread about it and can link you
Arguably, that was more an issue with my feather decisions than with my orb decisions. I could have spent more orbs on units that seemed moderately interesting to me and less on fodder. I would have had a few more units to work with during those wretched months, but they would probably be mostly benchwarming these days. Even most of my 5*s don’t even see that much use now, and I’ve figured out for the most part how to clear AA using my underinvested units and 4* hard-counters (ex: give Selena axebreaker).
So…I guess that means it’s fine to summon mostly for meta units and fodder and very little else, and to be very picky about orb prices?
If you’re after 4* units, I think my recommendation is definitely to wait. Using free summons to chase them is probably ok, but if I’m not mistaken it’s usually easier to pull a focus unit than a specific 3* or 4* unit. They will come, eventually. Quick enough? Well…why do you need them so soon? Keep in mind that they’re harder to pull than focus units from any specific stone of a given colour and also that they will appear on any banner, whereas 5* exclusives are very hard to get if they aren’t focus units. If there are 5* exclusives you know you want and are willing to pay orbs for, then save your orbs for those units.