I solo everything... or nearly everything. Bosses like Belloq and Luska are those I can't actually handle unless I'm in a group (unfortunately for me, I had to deal with a boss from my very own school just to get my recent spell). By then I become a support or the person who takes the blunt of the attacks rather than actually attacking. Let's just say I have really high resistance for the whole target aspect. Would I ever reveal it? No....
A great majority, however... I can definitely handle, and being a soloist definitely has perks that I enjoy utilizing.
2. Technically, you can do whatever you want, whenever you want, however you want. If you feel the need to farm, quest at midnight (who doesn't like the silence of the realms and getting all the wooden/silver chests to themselves?), visit Malistaire, join a team to farm the Loremaster....
3. You know what works for you and what doesn't. You have a deck for trivial creatures, lower level bosses, and the upper level bosses, and possibly more than that. Maybe you have a combination in one.
I don't mind giving blades or healing – in fact, I do them without asking sometimes. But there's a fine line between asking, begging, and demanding.
5. It doesn't take as long to get around to choosing your card compared to two, three, or four other people.
6. No one takes away the traps that are set up, accident or no accident.
8. You really can't be embarrassed if you meant to reply to a friend but say it out loud. No one can hear you, after all.
9. When all else fails... wing it.
Okay, you can totally handle bosses from your own school. It'll just take a really long time (even if I spectral blast and hydra all the time), and it could potentially lead to a lot of virtual deaths.
2. You have to carry around all kinds of outfits and equipment because each one is different. You have one for mobs, defense only, healing and support, attacking only, bosses from your own school, PvP (if you fancy it), you name it.
3. You have to be on constant alert of your dwindling health (I mean, aren't we always?)
5. It can be really lonely sometimes. Of course, when you're like me and haven't played in years, then it's obviously lonely.
6. You have to create your own strategy.
8. Your friends can't always port in if you're in a dungeon.... no matter how much you're mentally crying because you're low on health and so is the boss and it's just really hard to tell who will come out alive.
10. There might not be enough gold to get proper equipment. Let's just say this applies for the first timers. After that first wizard and you make more little baby wizards... it becomes really easy to hop onto your main, beat up a boss a million times, put useless items in the shared bank, switch characters, get those items out, and sell them. Puh-lease. You've never done this before?
11. Luck isn't necessarily on your side.