I am currently in a homebrew campaign. Our GM had a wonderful idea for when one of our members could not attend sessions. Instead of simply skipping a session (imagine the horror) we could play a dungeons and dragons version of the basketball game PIG. We would each pick an encounter: picking a monster, starting distance between the monster and our character, surprise round in our favor or it's, weather, terrain, lighting, and any other special conditions like rocks falling or other geographical dangers. Now if one of us won their encounter and the next failed, you gained a letter. Last one standing without the word spelled out wins a trait, ability score point, evolution point or whatever the prize is. Now I have an issue. The fighter has been cleaning house. I play a level 2 summoner: HP= 11, STR=12, DEX=14, CON=12, INT=10, WIS=7, CHA=18 with my Eidolon: HP=19, STR=17, DEX=13, CON=13, INT=7, WIS=10, CHA=11 with a bite attack for 1d8+3 and a tail slap attack for 1d6+3. I am up against a level 2 fighter and I dont know his stats off hand but they're about equal to mine, except cha is dumped and str is up. He simply builds the encounter so that the monster starts right in front of him. He can tank the first hit and then waste it. I however, cannot tank the first hit and usually go down and gain a letter. I need some really good monsters that would do some serious damage to a fighter, but not to a level 2 summoner. I have the feat Augment Summoning and it's pre-req Spell Focus Conjuration. My strategy is usually to have my Eidolon out, then cast shield on him or me to buff his/my AC, then have him charge while I summon minor monsters or charge in with my morningstar or use my heavy crossbow. The fighter usually uses his crossbow then charges in with his cutlass when things get hairy. Let me know if anyone has any way they can troll a fighter but help a summoner. Danka
The problem is that, ultimately, your tactics amount to the same thing: hit them with physical damage. I'd suggest a swarm, that way he couldn't damage it, but neither could you. I'd suggest something flying, but you both have ranged weapons. They game is rigged to be in his favor; you're not designed to be a damage-dealer. The only way for you to rig it in your favor is to rely on your spells instead of your eidolon.
Otherwise, you might try picking something like a group of enemies instead of one, like a band of kobolds or goblins. You have two actions per turn, he has one.
One other question: are you actually failing the encounters? Or is he just beating them in less rounds? If you're straight losing the encounters, you have other issues than just beating the fighter. If he's beating them in less rounds...not much you can do about that.
If you're REALLY desperate:
The rust monster was actually something I had up my sleeve. I use mainly my eidolon and other than it's rust attack it only has a 1d3 attack. i can tank that but he's kinda screwed once he runs out of weapons. I was thinking maybe throw a tengu or something out there so theres at least one damage dealer.
Your HP seems really low. Are you not getting full HP for your first level? I mean, d8 + 1 (con) + 1 (favored class) = 10, at second level your minimum HP should be 13 (assuming that you roll a 1 on you d8 at level up).
I rolled a 1 at 2nd lvl. Plus, I'm putting my favored class into skill points since I'm the only one that has literally ANY.
Make a trap that is diable or die... you aren't a fighter trying to beat him at this level in a fight is suicide.
Herd of cats. That'll learn him.