4. Soloing
Sometimes you want to solo - maybe to make some extra cash in temple or whatever. This is where summons capsules come handy. Just ask your friends to give them to you if they find it. Fully buffed summon is sometimes stronger than you, has more hp, and doesn't cost any SP, unlike Phantoms(which miss just about everything on later levels) or Elemental.
5. Where to level?
Now that's a easy one - you level where your party wants to Good thing about Cleric is that you can be lowest level in party and still contribute the most(just make sure exp division is equal if partying with *much* higher level people, or risk doesn't compare with rewards). Example, I went to GoS below level 60 and did pretty well there - it all depends on party members. I started going on Elder Mammoths before level 90. Astarots - below 100. Your level is not important, your party members are. And your buffs, obviously.
6. How to get rich?
Very simple, party with Bourg and go to temple. With your buffs he will kill fast and extra drops add fast, letting you get few millions in one day in t2/3. I learned about it too late to benefit - it was my clanmate's Cleric(lower level^^) who did that and got much richer than me
If you don't feel like leveling and just want to wait a while doing nothing - go to some "weaker" areas and buff people there for cash While most of them will only "buff pls" you, some of them might recognize your talent and give you some pots or cash. This is, of course, not a real method of becoming rich, just something to do in your spare time, that can also bring cash. Careful though, many people will annoy you later with friendlist requests Best to stick with your lower level clan members, and make a simple exchange, ie. I buff you, you give me part of drops(if they're leveling in Goblin Caves)
Also, you don't really need expensive equipment, since generally you're not fighting anything directly. So you save money on refines.
7. PVPing.
If you are *full* support, it will be miracle if you manage to kill someone at your level in PvP. With no combat spells, you are limited to physical attacks, which aren't really that great. If you have Fire Ring, your chances are sligthly better, but you simply do not do enough damage to defeat someone at your level. Blessing Armor and Cure/Heal make you very difficult to kill, but do not overestimate them. As a Cleric, you're always first target of opponents party - and in such cases you should carry potions with you, your spells will not be enough.
Also, be careful in Forgotten Temple, people like to use White Icings there to Silence you - thus making you unable to use skills for few seconds, which can be enough. Potions are a must in such cases, unless you run fast enough to avoid them - which can be tricky against Dex Up users.
However, if you *do* want to kill something, you would need at least few combat skills. Not neccesarily at high level, Power and Damage support can make lvl1 skill into level 5. Lvl1 Mana and Ice bolt are cheap, compared to amount of SP you get at higher levels and still do some damage. For maximum effect, switch to staff and use Staff Stun, this skill stuns surprisingly often and combined with lightning it can actually let you kill people - unless they're another Cleric that just heals himself - or someone who drinks potions like crazy.
In short, your basic tactic is : Cast Blessing Armor and use your offensive skills if you have them - if you don't, just keep healing and hope they get tired and leave you alone. Self healing Cleric is probably toughest class to kill(without Silence), giving your friends(you didn't go on CF alone, did you?) time to help. It is possible to outrun Soldiers and use hit&run to slowly wear them down with Wand attacks, but if you don't even have Fire Ring, it will take ages and if they get close to you, lack of stuns will kill you.
In temple, your summons can deal significant damage and actually let you get kills(especially if you have Summon Mastery lvl2 allowing you to summon 2 of them)
8. Parties
First of all - partying with strangers is usually waste of time. *Especially* if they're clanless strangers. In such case, they respond to no one for their behaviour and can be as nasty as they want. First sign is usually "anyone" item share setting. Such parties should be avoided at all cost - since Cleric buffs from distance, you won't be able to pick items before meeleers do that. In the end, you will use hundreds of OJs/CBs(crystal berries) and not gain anything.
If party sets items to orderly - make sure to tell them not to split up. That is another main problem with random people - they run off in all directions and expect you to heal them, ignoring the fact that you have to run through half of map to do so. There is also "quest monster" syndrome, where they break combat and run off to kill that Kaiman Warrior or whatever. In such case - ignore them and focus on main group. If you chase after them(assuming they are in trouble), not only you will not make it on time, you will also leave main group in danger. If they're smart, they will use meat or potions. If not - it's their fault.
Also, just because you heal people, it doesn't mean they can take on anything, *especially* if they decide not to use their own healing potions/meat. Taking on stronger monsters is fine, but there's limit to that. If you find yourself constantly using OJs just to keep party *barely* alive - look for easier area.
In general, it is best to party with clan. Be it your own, or just random clan. Unless that random clan has negative reputation. If you're clanless and do well, you might get invited - Clerics are in high demand in most clans. If it's your own clan - things are so much easier. You partied before, they know how to behave, they will(or at least should) share items when needed. That's what partying is all about.
Myself, I heal whenever ones HP drop below 75% - it's somewhat taxing on mana, but I can be sure they won't die unless something unexpected happens(i.e. Candle Ghost buffing all monsters in area) This is also important when people don't use meats - you can't wait for them to drop too low.
And if someone feels like he's being merciful by allowing you to join party and treats you like walking HP potion - leave.